15 Abandoned Military Bunkers in America You Can Still Explore
If you’re searching for a unique, slightly eerie adventure, America’s abandoned military bunkers have a lot to offer. These sites aren’t just relics from a tense past—they’re unexpected windows into history, scattered across the country from coast to coast. Some stand in the shadow of old missile silos, others overlook wild coastlines, while a few are tucked deep in forests. Get ready to explore a world of forgotten tunnels and thick concrete walls, most waiting quietly for those curious enough to visit. Here are 15 abandoned military bunkers in America you can still explore.
Nike Missile Site SF-88 (California)
Hidden in the scenic hills of Marin Headlands, just north of San Francisco, Nike Missile Site SF-88 offers a close look at Cold War defense history. Complete with restored missile silos and underground tunnels, this site is family-friendly and open to the public on most weekends. The park rangers provide insightful tours, making it easy to imagine what life was like for the soldiers stationed here.
Fort Stevens State Park (Oregon)
Once a powerful military installation protecting the Columbia River, Fort Stevens now welcomes visitors with open bunkers and miles of trails. The concrete structures are sturdy and atmospheric, surrounded by mossy woods and sandy beaches. Wandering the dark passageways feels like stepping back in time.
Fort Tilden (New York)
Set along the wild beaches of Queens, Fort Tilden’s abandoned bunkers are covered in colorful street art and open to curious explorers. Here, you’ll find World War II gun emplacements, hidden magazines, and rooftop lookout points. Bring a flashlight for the darker corners, and enjoy sweeping ocean views from the top.
North Concord Air Force Station (Vermont)
High in the remote hills of Vermont, this site used to track potential threats from the north. Today, hikers can visit the concrete bunkers and towers, with panoramic views and a quiet, abandoned vibe. The easiest route follows old military roads, making it a scenic spot for a picnic—or an adventure with friends.
Vint Hill Farms Station (Virginia)
Once a top-secret signals intelligence base, Vint Hill now serves as a historical attraction in the rolling Virginia countryside. Some of the bunkers remain intact, offering guided tours and exhibits on Cold War espionage. You won’t want to miss the museum, which covers everything from coded messages to spy gear.
Fort Worden (Washington)
Located on the northern tip of the Olympic Peninsula, Fort Worden mixes dramatic coastal views with a complex web of abandoned bunkers and tunnels. Explore at your own pace, wandering between batteries and lookout towers. The park is dog-friendly, and there’s plenty of space for kids to roam.
Fort Morgan (Alabama)
Guarding the entrance to Mobile Bay, Fort Morgan is lined with thick-walled bunkers, underground chambers, and artillery positions. Visitors can venture through dimly lit rooms and wide open courtyards. The fort’s rich Civil War history adds depth to every step.
Fort Casey State Park (Washington)
Perched on Whidbey Island, Fort Casey’s aging concrete bunkers are open for hands-on exploration. Climb spiral staircases, step into cavernous magazines, or gawk at the massive disappearing guns still on display. The nearby lighthouse adds even more charm to the site.
Fort MacArthur Upper Reservation (California)
Overlooking the Pacific in San Pedro, the Upper Reservation of Fort MacArthur includes several abandoned bunkers and artillery batteries repurposed as museum space. Some tunnels are still accessible, giving a taste of the site’s military past.
Cape May Bunker (New Jersey)
Half-buried in sand at Cape May Point State Park, this concrete bunker dates to World War II and sits right on the Atlantic shoreline. While weathered by sun and sea, it’s still sturdy. Bring your camera for stunning sunset shots over the ocean.
Fort Wadsworth (New York)
One of America’s oldest military sites, Fort Wadsworth on Staten Island is sprinkled with hidden bunkers and winding underground passages. Some areas are open for guided tours, revealing layers of history from colonial days to the Cold War.
Fort Dade (Egmont Key, Florida)
Accessible only by boat, Egmont Key houses the eerie ruins of Fort Dade, including crumbling bunkers overrun by mangroves. The island offers a peaceful escape and a rare chance to walk through sunlit, abandoned halls with seabirds overhead.
Abandoned Nekoma Pyramid (North Dakota)
Known for its bizarre pyramid-shaped radar structure, Nekoma once served as a missile defense base. While you can’t access the inside, the surrounding bunkers and silos remain visible from public roads. It’s a standout stop for lovers of Cold War architecture. For more on locations like this, check out this article on abandoned bunkers in the US.
Fort Jefferson (Florida)
Sitting in the clear waters of the Dry Tortugas, Fort Jefferson boasts thick brick walls and cavernous magazines. The fort’s remote location—reachable by ferry or seaplane—adds to the adventure, and the tropical setting makes for a great day of exploring.
Granite Mountain Records Vault Bunkers (Utah)
While the official vault is off-limits, the area near Little Cottonwood Canyon holds several abandoned mining and military bunkers. These rugged sites attract hikers, photographers, and urban explorers. The views of the Wasatch Mountains make the trek worthwhile.
From windswept coastal forts to hidden mountainside bunkers, America’s abandoned military sites offer a rare peek into the nation’s defense history. Most are accessible, safe, and packed with stories you won’t find anywhere else. Before heading out, always check local regulations and wear sturdy shoes—these sites aren’t always on the beaten path. If you want to dig deeper into the world of hidden bunkers and how to find them, there’s a helpful guide on locating abandoned military bunkers.
Ready to plan your next offbeat adventure? Don’t forget to bring your camera and curiosity—these abandoned bunkers are waiting for you to explore.
