At the peak of the Cold War, the United States operated thousands of military installations across the continent and beyond. Bases were built in deserts, on barrier islands, in suburban backyards, and on wind-blasted volcanic rocks in the middle of the Pacific. When the Soviet Union collapsed and defense budgets shrank, hundreds of these installations were shuttered, sometimes overnight. The troops shipped out, the equipment was carted off, and entire communities vanished. What remains are some of the eeriest abandoned places in America: barracks where beds are still bolted to the floors, bunkers with blast doors hanging open, and radar towers scanning an empty sky. Here are five decommissioned military bases that tell the story of America's 20th-century defense machine.
1. Fort Ord, California
For over half a century, Fort Ord was one of the largest military installations on the West Coast. Sprawling across 28,000 acres of prime Monterey Bay coastline, the base trained hundreds of thousands of soldiers from World War II through Desert Storm. At its peak, over 35,000 military personnel and their families lived and worked here. Then came the 1993 Base Realignment and Closure (BRAC) round, and Fort Ord was done.
The closure hit the Monterey Peninsula like a bomb. The local economy lost an estimated $2 billion virtually overnight. The military pulled out, and what they left behind was staggering: hundreds of barracks, mess halls, headquarters buildings, motor pools, firing ranges, and family housing units, all sitting empty on some of the most valuable real estate in California.
Three decades later, Fort Ord is a place caught between demolition and redevelopment. California State University Monterey Bay occupies a portion of the old base, and the Veterans Transition Center uses some former housing. But vast swaths remain untouched. Entire streets of two-story barracks stand in rows, their windows smashed, walls tagged with graffiti, and floors littered with debris. The old stockade is still standing. Training buildings with Cold War-era murals on the walls are slowly being swallowed by coastal scrub.
The real obstacle to redevelopment is contamination. Fort Ord is a Superfund site. Decades of military activity left behind unexploded ordnance, fuel spills, and chemical waste. Cleanup costs have run into the hundreds of millions and the work is still ongoing. Large sections of the base are fenced off with warning signs about UXO (unexploded ordnance). You can hike and mountain bike through some areas, but straying off the marked trails is genuinely dangerous.
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2. Camp Hero, New York
At the very tip of Long Island, past the mansions of the Hamptons and the fishing boats of Montauk, sits Camp Hero, a former military base that inspired one of the biggest conspiracy theories in American history. The base was established in 1942 as Fort Hero, part of the coastal defense network protecting New York Harbor from a German naval attack that never came. After World War II, the site was handed to the Air Force, which installed an AN/FPS-35 long-range radar antenna on an 80-foot tower, one of the signature pieces of Cold War-era SAGE (Semi-Automatic Ground Environment) air defense system.
The radar tower is still there, rising above the scrub oaks like a relic from a science fiction movie, and it's that tower that launched Camp Hero into pop culture legend. In the 1980s, conspiracy theorists began claiming the base had been used for secret government experiments in mind control, time travel, and interdimensional portals. The so-called "Montauk Project" became the subject of books, documentaries, and eventually Netflix's Stranger Things, which borrowed heavily from the mythology (the show's creators originally titled the pilot "Montauk").
The actual history is less exotic but still fascinating. During World War II, the base disguised its gun batteries as a New England fishing village, complete with fake houses built on top of concrete bunkers. You can still see the concrete foundations poking through the grass. After the radar station was decommissioned in 1981, the military transferred the property to New York State, which turned it into Camp Hero State Park.
Today you can walk the trails past crumbling bunkers, battery emplacements, and the massive radar tower. The underground spaces are sealed off, which naturally fuels more speculation about what's down there. The bluffs offer stunning views of the Atlantic, and on a clear day you can see Block Island. It's a surreal combination of natural beauty and military decay that draws hikers, conspiracy buffs, and urbex enthusiasts in roughly equal numbers.
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3. Nike Missile Site C-44, Illinois
During the 1950s and 1960s, the U.S. Army ringed America's major cities with Nike missile batteries, a defensive shield against Soviet nuclear bombers. Chicago alone had over a dozen sites positioned in an arc around the metropolitan area. Nike Site C-44, tucked into the far southeast side of Chicago in the Hegewisch neighborhood, was one of them. Today it's an overgrown concrete ghost, one of the best-preserved remnants of Cold War paranoia hiding in plain sight in a residential area.
The Nike program represented a dramatic shift in air defense strategy. Rather than relying on fighter interceptors to shoot down enemy bombers one by one, the Army deployed guided missiles that could be launched from fixed positions and steered to their targets by radar. The Nike Ajax missile, and later the nuclear-capable Nike Hercules, could theoretically knock down an entire formation of bombers with a single warhead. By 1958, nearly 300 Nike batteries were operational across the United States.
Site C-44 followed the standard Nike layout. It consisted of two main areas separated by about a mile: the Integrated Fire Control (IFC) area, which housed the radar equipment and fire-control computers, and the Launcher area, where the missiles were stored in underground magazines and raised to the surface on elevators for firing. The launcher area at C-44 had three underground magazines, each capable of storing several missiles on rails.
The site was decommissioned in the early 1970s as the Nike program was phased out in favor of ICBMs. The IFC area was repurposed for various uses over the years, but the launcher area was largely abandoned. The underground magazines are still there, flooded with groundwater and sealed behind rusted hatches. Above ground, you can find the concrete launch pads, the elevator rails, and the remains of the guard shack. Drone footage reveals the full outline of the base, its geometry still sharp against the surrounding marshland. For Cold War history buffs, it doesn't get more authentic than this.
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4. Fort Pickens, Florida
On the western tip of Santa Rosa Island, where the Gulf of Mexico meets Pensacola Bay, Fort Pickens has been crumbling in tropical salt air for nearly 200 years. Built between 1829 and 1834 as part of a ring of fortifications defending Pensacola's deep-water harbor, the massive pentagonal brick fort is one of the largest pre-Civil War coastal forts in America and one of the few in the South that never fell to the Confederacy.
Fort Pickens was constructed using over 21 million bricks and designed to mount 200 guns across multiple tiers of casemates. The walls are up to 12 feet thick in places, built to absorb direct hits from naval cannon. During the Civil War, Union forces held Fort Pickens throughout the conflict, using it as a base to blockade Confederate shipping and launch raids on mainland Florida. The famous Apache leader Geronimo was imprisoned here from 1886 to 1888, a detail that still draws visitors to his former cell.
The fort remained in military use through World War II, when it served as a coastal observation post and housed anti-aircraft batteries. But by 1947, the military was done with it. The fort was transferred to the National Park Service in 1971 and became part of the Gulf Islands National Seashore.
What you find today is a haunting blend of military architecture and subtropical decay. Many of the casemates are open to exploration: you can walk through dark, vaulted brick tunnels where cannons once pointed out to sea. Sand has drifted into some of the lower chambers. Tropical vegetation creeps over the ramparts. Beyond the fort proper, the surrounding dunes hide additional military ruins from different eras: Battery Pensacola from the Spanish-American War period, and World War II-era concrete bunkers half-buried in white sand. The beaches are pristine, and the snorkeling off the fort's seawall is surprisingly good. It's the rare abandoned military site where you can combine history with a beach day.
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5. Adak Island Naval Air Station, Alaska
Adak Island sits in the Aleutian chain, roughly 1,200 miles southwest of Anchorage and closer to Tokyo than to the lower 48. During World War II, the U.S. Navy built a massive air station here to counter the Japanese occupation of the nearby islands of Attu and Kiska. At its peak during the Cold War, over 6,000 military personnel and their families lived on Adak, making it one of the most remote populated places in North America. It had schools, a McDonald's, a bowling alley, a movie theater, and a hospital. Then the Cold War ended, and in 1997, the Navy packed up and left.
What remains is one of the most surreal abandoned places on the planet. Entire neighborhoods of military housing sit empty on the treeless, wind-battered hillsides. The houses are still furnished: beds, couches, kitchen tables, children's toys. The school gymnasium still has a scoreboard. The hospital corridor lights flicker in the wind. The runways and hangars are intact but slowly surrendering to the relentless Aleutian weather, a combination of horizontal rain, 100-mph willawaw winds, and dense fog that rolls in without warning.
Getting to Adak is an adventure in itself. Alaska Airlines runs a twice-weekly flight from Anchorage, weather permitting (flights are canceled regularly). About 100 people still live on the island, mostly working in the fishing industry. There's no hotel; visitors stay in repurposed military housing that ranges from basic to very basic. The town, if you can call it that, has a small general store and not much else.
The abandoned base covers thousands of acres and includes underground bunkers, ammunition magazines, fuel storage facilities, and the remains of a nuclear weapons storage area. The Navy conducted a partial environmental cleanup, but contamination remains an issue. Eagles nest on the old radar towers. Foxes, introduced during the fur-farming era, roam the empty streets. The landscape is raw and volcanic: no trees, just tundra grass, wildflowers, and the constant sound of wind. For sheer isolation and post-apocalyptic atmosphere, nothing in the continental United States comes close.
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Beyond the List
America's abandoned military landscape is enormous. From the concrete submarine pens at the former Charleston Navy Yard to the mothballed hangars at Wendover Airfield in Utah, where the Enola Gay crew trained for the Hiroshima mission, decommissioned bases dot every corner of the country. Many are undergoing slow redevelopment; others are locked behind fences, quietly corroding. If the Cold War interests you, start hunting for Nike missile sites in your own metro area, chances are good there's one within a 30-minute drive. Our interactive map can help you find it.
Related reads: - Abandoned Prisons in America: 5 Correctional Facilities Left to Rot - Abandoned Mines in America: 5 Forgotten Mining Sites - Abandoned Amusement Parks in America: 5 Forgotten Fun Parks - Explore all abandoned places in the United States →
