Minnesota holds 178 documented abandoned places on the Urbex Maps atlas -- a count that reflects the state's layered economic history: the iron ore mining of the Iron Range, the timber industry that stripped the northern forests bare by 1900, the flour milling empire that made Minneapolis the mill capital of the world, the sanatorium infrastructure built to battle tuberculosis along Lake Superior's shore, and the military and institutional campuses that the early 20th century demanded. When those industries and institutions contracted, they left behind the characteristic abandonment landscape of the upper Midwest.
Minnesota's most significant abandoned places span from the Lake Superior shoreline north to the abandoned towns in Minnesota's Iron Range that once produced more iron ore than any region on earth, south through the Mississippi River corridor where the ruins of the world's greatest flour milling district still stand in downtown Minneapolis. Nopeming Sanatorium in Duluth is the most iconic abandoned institutional building in the state. The Duluth Air Force Base is one of the largest abandoned Cold War military complexes in the upper Midwest. The ghost towns of the Iron Range are the most geographically concentrated collection of abandoned communities in Minnesota.
This guide covers 10 of the most significant abandoned places in Minnesota, with free GPS coordinates on the Urbex Maps interactive atlas, verified YouTube embeds, and factual historical context.
Free urbex GPS: how Urbex Maps works
Every spot in this guide has a free GPS pin on the Urbex Maps interactive atlas. No account required -- just coordinates with satellite imagery and access notes. The full Minnesota database has 178 documented locations, covering sanatorium ruins, industrial ghost towns, Cold War military sites, asylum campuses, and abandoned mining districts.
1. Nopeming Sanatorium, Duluth
Nopeming Sanatorium in Duluth is the most iconic abandoned building in Minnesota -- a tuberculosis sanatorium established by St. Louis County in 1912 on a forested hilltop above the city, where the clean air and isolation that early TB treatment demanded could be provided to patients who had no other options. The name Nopeming comes from the Ojibwe word meaning "in the forest," and the sanatorium's location in the woods above Lake Superior was deliberately chosen for the curative environment it offered.
The complex grew substantially over the following decades, adding patient wards, staff quarters, a powerhouse, and the colony farm buildings that characterized the self-sufficient institutional campuses of the era. At its peak Nopeming housed hundreds of TB patients from across northeastern Minnesota and served as the primary tuberculosis treatment facility for the region's substantial Scandinavian and Finnish immigrant mining population, who were disproportionately affected by the disease.
Nopeming was converted from a TB sanatorium to a nursing home facility in 1952 when tuberculosis treatment advances made the sanatorium model obsolete. The facility operated in various capacities until its final closure. The buildings are now vacant, the windows boarded, and the forest is slowly reclaiming the grounds. The complex is frequently cited as one of the most atmospheric and historically significant abandoned buildings in Minnesota.
2. St. Paul Union Depot Power Plant, St. Paul
The St. Paul Union Depot Power Plant is a massive Beaux-Arts industrial building constructed in 1917 to provide steam heat and electrical power to the Union Depot passenger rail terminal and the surrounding Lowertown district of St. Paul. The plant stands directly on the Mississippi River bluff in Lowertown, its five enormous brick chimney stacks serving as landmarks visible across much of downtown St. Paul. The building's scale reflects the ambition of the early 20th century railroad era, when Union Depot was one of the busiest passenger rail facilities in the upper Midwest.
The power plant served the depot complex through the peak rail years of the 1920s through 1940s and continued operating in reduced capacity through the mid-20th century. As rail travel declined and the Union Depot itself went through periods of closure and repurposing, the power plant was eventually shut down and left vacant. The enormous boiler room, turbine hall, and coal handling infrastructure remained largely intact, preserved by the building's massive construction.
The Union Depot itself was restored and reopened as a transit hub in 2012. The power plant building has been identified as a significant historic structure in the Lowertown Historic District and is part of ongoing redevelopment planning. The ruins of the boiler house and the surviving chimney stacks make the power plant one of the most impressive industrial ruins in the Twin Cities.
3. Schott's Grain Elevator, Red Wing
Schott's Grain Elevator in Red Wing is one of the most photographed abandoned industrial structures in the Mississippi River valley -- a towering complex of concrete grain storage cylinders built in the early 20th century to serve the agricultural processing trade on the upper Mississippi, now standing empty against the river bluffs that give Red Wing its dramatic landscape. Red Wing sits at a natural break in the river bluffs where the Mississippi turns, creating the sheltered harbor that made it a natural grain shipping point for southeastern Minnesota's wheat country.
The elevator complex was built to consolidate grain from surrounding farms and load it onto river barges and rail cars for transit to the Twin Cities milling district and beyond. At its operational peak the elevator handled hundreds of thousands of bushels of wheat and corn from Goodhue County farms. The concrete construction -- cylinder silos built to store grain under controlled temperature and humidity conditions -- proved more durable than the wooden elevators that preceded it, and the structure has survived long after the agricultural trade patterns that justified its construction shifted elsewhere.
The abandoned elevator stands as the dominant industrial landmark of Red Wing's riverfront, visible from the bluff-top highway that overlooks the city. The Mississippi River setting, the dramatic concrete forms rising against the limestone bluffs, and the late afternoon light on the cylinder skins make this one of the most photogenic grain elevator ruins in the upper Midwest.
4. Duluth Air Force Base, Duluth
The Duluth Air Force Base -- officially Duluth International Airport Air National Guard Base -- is one of the most significant Cold War military sites in the upper Midwest, a facility established in 1946 to defend the strategically critical Great Lakes industrial region against Soviet bomber attack. The 343rd Fighter Interceptor Squadron was based here, flying F-89 Scorpion and later F-101 Voodoo interceptors on continuous alert status throughout the 1950s and 1960s at the height of the Cold War nuclear threat. The base sat on the Lake Superior shoreline, positioned to intercept any Soviet aircraft approaching from the north over Canada.
The base infrastructure -- hangars, barracks, alert facilities, radar installations, and the distinctive dispersed aircraft shelters designed to survive a nuclear near-miss -- expanded significantly during the 1950s buildup. The Duluth SAGE system (Semi-Automatic Ground Environment) computer facility, designed to coordinate interceptor response to incoming Soviet bombers, was one of the most advanced air defense installations in the Great Lakes region.
The facility transitioned to the Minnesota Air National Guard and portions of the base infrastructure were closed and surplus. The abandoned hangars, barracks, and support buildings from the Cold War era stand on the airport grounds, with the civilian Duluth International Airport continuing to operate on the same runways. The deteriorating alert hangars and Cold War-era support infrastructure make this one of the most historically significant military ruins in Minnesota.
5. Forestville Ghost Town, Preston
Forestville in Fillmore County is the most intact surviving ghost town in Minnesota -- a community of 100 people that died almost overnight in 1868 when the Southern Minnesota Railroad chose a route that bypassed the town, rerouting traffic through the new town of Preston two miles away and cutting Forestville off from the commercial connections it needed to survive. Within three years of the railroad decision, nearly all of Forestville's residents had abandoned the town, leaving behind the buildings they had built with the expectation of permanent prosperity.
What makes Forestville exceptional is the survival of the Meighen Store and farm complex -- a general store, house, root cellar, and outbuildings that passed through a single family's ownership for over 100 years without significant alteration. When the Minnesota Historical Society acquired the property in 1963, they found a 19th-century commercial farm preserved almost exactly as its last occupants had left it. The Meighen family had continued operating the store as a combined retail and farming operation until the 1940s, maintaining buildings and equipment in a state that made the site one of the most intact examples of mid-19th century rural commercial architecture in the upper Midwest.
Forestville/Mystery Cave State Park now encompasses the site, and the Minnesota Historical Society operates the Forestville Historic Site with living history demonstrations. The preservation is so complete that it provides a window into rural Minnesota commercial life in the 1890s that no amount of museum reconstruction could replicate.
6. Minnesota State Public School, Owatonna
The Minnesota State Public School for Dependent and Neglected Children in Owatonna is one of the most historically significant abandoned institutional complexes in Minnesota -- a cottage-system orphanage established in 1886 that housed thousands of Minnesota's most vulnerable children over 70 years of operation. The school was designed on the cottage model advocated by reformers of the era, replacing the large congregate dormitories of earlier orphanage design with a series of smaller "cottage" buildings intended to provide a more family-like environment for the dependent children in state care.
The campus that grew up in Owatonna included a central administration building, a school building, a hospital, a chapel, and approximately 20 cottage buildings arranged around a central green. The brick buildings, most built between 1886 and 1910 in the Romanesque Revival and Late Victorian styles, created one of the most architecturally coherent institutional campuses in the state. From 1886 to 1945, over 10,000 children passed through the institution -- some orphaned, many removed from families deemed unfit by Progressive Era social standards.
The facility closed in 1945 as child welfare philosophy shifted away from institutional care toward foster placement. The campus was converted to various uses before falling into disuse. A Heritage Center and museum now occupy part of the original campus, preserving the history of the children who lived there. Several of the original cottage buildings and the central structures survive, making this one of the most intact examples of Victorian-era cottage orphanage architecture in the Midwest.
7. Split Rock Lighthouse Keeper's Quarters, Lake County
Split Rock Lighthouse in Lake County stands on the north shore of Lake Superior atop a 130-foot basalt cliff and is the most photographed lighthouse in the United States -- a Fog Signal Building and lighthouse complex completed in 1910 to warn ships away from the treacherous rocky shoreline that had claimed 29 vessels in a single storm in November 1905. The lighthouse was built in response to the catastrophic Mataafa Storm, which drove ship after ship onto the rocks of the north shore as crews struggled with hurricane-force winds and zero visibility in early winter conditions.
The lighthouse itself operated until 1969, when modern navigational technology and the decline of Great Lakes shipping made the manually staffed lighthouse obsolete. The Minnesota Historical Society took ownership of the site and operates it as a historic site. What concerns the urbex atlas is not the lighthouse tower itself but the abandoned keeper's complex -- the fog signal building, the oil houses, the tramway, and the associated structures that supported the lighthouse operation -- which preserve the working infrastructure of Lake Superior lighthouse operations in remarkable completeness.
The Split Rock site is one of the most visited state historic sites in Minnesota. The structures are in a state of managed preservation rather than active decay, but the isolation, the dramatic cliff setting above Lake Superior, and the completeness of the surviving lighthouse infrastructure make this one of the most significant historic complexes on the Great Lakes.
8. Abandoned Flour Mills, Minneapolis
The Mill District ruins along the Mississippi River in downtown Minneapolis are the remains of what was once the most productive flour milling complex in the world -- a stretch of riverfront where the St. Anthony Falls power source, the first and only natural waterfall on the entire Mississippi River, drove mills that at their 1880s peak were producing one-third of all the flour milled in the United States. The ruins in Mill Ruins Park and the adjacent Mill City Museum preserve the surviving masonry and foundation walls of the Washburn-Crosby and Pillsbury complexes that dominated global flour production for three decades.
The catastrophic Washburn A Mill explosion of 1878 -- caused by flour dust ignition in the mill's enclosed spaces, killing 18 workers and destroying much of the adjacent mill district -- was the industrial disaster that drove the development of dust-free milling technology and led directly to the modern roller milling process that replaced millstone grinding worldwide. Minneapolis millers invested the insurance settlements in the new technology and came back larger and more productive than before, dominating global flour markets through the 1880s and 1890s.
The surviving ruins -- the below-grade millrace tunnels that channeled water from the falls, the masonry walls of destroyed mills, the power stations and canal system -- are preserved in Mill Ruins Park and accessible to visitors year-round. The Mill City Museum is built directly into the ruins of the Washburn A Mill, incorporating the surviving fire-damaged walls as museum architecture.
9. Iron Range Ghost Towns, St. Louis County
The Iron Range ghost towns of St. Louis County represent the most geographically concentrated collection of abandoned communities in Minnesota -- a series of mining towns established between 1890 and 1920 to house the workers who extracted iron ore from the Mesabi Iron Range, the largest iron ore deposit in North America. The Mesabi Range produced more iron ore than any other place on earth during the first half of the 20th century, making Minnesota the industrial foundation of American steel production and, by extension, American industrial power through two World Wars.
The ghost towns include Elba, Leonidas, Sparta, Genoa, Penobscot, and dozens of smaller mining settlements that were established by mining companies to house workers near the open pit and underground mines. When the high-grade iron ore was exhausted, the mining companies moved on, leaving behind the housing, churches, schools, and commercial buildings that had served the mining population. Some towns were physically moved or demolished to allow mine expansion; others were simply abandoned as workers relocated to larger nearby communities.
The scale of abandonment is difficult to comprehend without visiting: hundreds of structures across dozens of abandoned townsite locations on the Iron Range, from single-family miners' homes to the commercial blocks and institutional buildings of larger communities. The landscape is defined by the enormous red iron ore pits that consumed some towns and the boreal forest that is slowly reclaiming others.
10. Glensheen Carriage House, Duluth
Glensheen in Duluth is the most significant historic estate on the Lake Superior shore -- a 39-room Jacobean Revival mansion built from 1905 to 1908 by Chester Congdon, an attorney and investor who accumulated a substantial fortune from iron ore mining rights on the Mesabi Range. The estate was designed by architect Clarence Johnston and features formal gardens, a boathouse, a carriage house, and the service infrastructure of an Edwardian-era country estate transplanted to the Lake Superior shoreline at the eastern edge of Duluth.
The Glensheen carriage house and service complex is the portion of the estate most relevant to the urbex atlas -- the utilitarian buildings that housed the horses, carriages, and equipment that supported the mansion's domestic operation in the years before automobile transport became standard. The carriage house is a substantial brick structure designed in the same Jacobean Revival vocabulary as the main house, reflecting the era's tendency to give even utilitarian estate buildings architectural attention. The complex also includes root cellars, tool storage, and the gardening infrastructure of the formal estate gardens.
Glensheen is best known for the 1977 murders of Chester Congdon's daughter Elisabeth and her night nurse -- one of Minnesota's most infamous unsolved crimes. The University of Minnesota Duluth operates Glensheen as a house museum. The carriage house and outbuildings are in various states of preservation and management, representing the surviving service infrastructure of the finest Edwardian estate on Lake Superior.
FAQ: Frequently Asked Questions about Abandoned Places in Minnesota
How many abandoned places are there in Minnesota?
The Urbex Maps database currently lists 178 documented abandoned locations in Minnesota. The state's abandonment landscape is shaped by three major historical forces: the complete exhaustion of the Iron Range's high-grade iron ore, which depopulated dozens of mining communities; the collapse of the Great Lakes timber industry, which emptied hundreds of logging camps and mill towns; and the deinstitutionalization movement of the 1960s-80s, which left tuberculosis sanatoriums, state hospitals, and orphanage campuses without purpose.
Is urban exploration legal in Minnesota?
Trespassing on private property is a misdemeanor in Minnesota under statute 609.605. Many of Minnesota's most significant abandoned places -- Forestville, Split Rock, the Mill City Museum ruins, Glensheen -- are on public land or state-managed historic sites and are legally accessible. The Iron Range ghost towns vary widely: some are on state forest land, others on private mining company property. Always verify the ownership status of a specific location before visiting.
What is the most haunted abandoned place in Minnesota?
Nopeming Sanatorium in Duluth is most frequently cited as the most haunted abandoned building in Minnesota, owing to the thousands of tuberculosis deaths that occurred there from 1912 through the 1950s. The Minnesota State Public School in Owatonna, where 10,000 children passed through institutional care over 60 years and where records document significant suffering, is the second most frequently cited. Both sites have been featured on paranormal investigation programs.
Can you visit the Iron Range ghost towns?
Access varies significantly by location. The Minnesota Historical Society's Minnesota Discovery Center in Chisholm interprets Iron Range history without requiring access to individual ghost town sites. Some abandoned townsite land is in public ownership through the Iron Range Resources and Rehabilitation Board, state forests, or county ownership; other areas are on active or former mining company property. The most accessible ghost town experiences on the Iron Range are at formally interpreted sites like Leonidas Mine Overlook and similar viewpoints managed by public agencies.
What happened to the Minneapolis flour mills?
The World's flour milling capital transitioned out of Minneapolis between 1900 and 1965 as railroads made it more economical to mill wheat closer to where it was grown in the Great Plains states, rather than shipping raw grain all the way to Minneapolis for milling. The Washburn-Crosby Company became General Mills and moved operations out of the riverfront district. Pillsbury similarly expanded nationally. The last operational mill on the original Riverfront site closed in 1965. The ruins were preserved and are now accessible in Mill Ruins Park adjacent to the Mill City Museum.
When was Nopeming Sanatorium built and why was it abandoned?
Nopeming was built in 1912 by St. Louis County as a tuberculosis sanatorium, positioned in the forest above Duluth specifically because the fresh air and isolation of the north shore environment were considered therapeutic for TB patients. The facility converted to a nursing home in 1952 when streptomycin and other antibiotics made the sanatorium model of TB treatment obsolete -- patients could now be treated with medication rather than requiring months or years of institutional rest. The nursing home operation eventually closed as the facility aged and required increasingly expensive maintenance. The buildings have been vacant for decades.
Conclusion: Minnesota, where industry and wilderness left their ruins together
Minnesota is a state where the ruins are as old as the ambition that built them. The Iron Range towns that produced the steel for American industry in two World Wars are being quietly absorbed back into the boreal forest from which they were carved. The flour mills that fed a continent for three decades are ruins along a river that still runs past their foundations. The sanatoriums that provided the only treatment available for tuberculosis are empty on their hilltops above Lake Superior, their patients long gone, their wards silent.
With 178 locations on the Urbex Maps atlas and more added regularly, Minnesota offers some of the most historically dense and geographically dramatic abandoned places in the upper Midwest. The 10 sites in this guide are starting points -- there are dozens more Iron Range ghost towns, abandoned farmsteads on the prairie margin, and institutional ruins scattered across the northern forest. The GPS coordinates are free. The map is live. Go find what Minnesota left behind.
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