Raven Rock Mountain Complex
Raven Rock Mountain Complex, Military bunker in Liberty Township, Pennsylvania.
The Raven Rock Mountain Complex is a military facility carved inside a mountain in Liberty Township, Pennsylvania, close to the Maryland border. The underground structure includes several buildings, rooms for technical equipment, supply facilities, and offices connected by a network of tunnels and corridors.
The construction of this facility began around 1950 as a protected command post in case of nuclear conflict, with land acquired by federal authorities. The facility was expanded and modernized several times during the Cold War to serve as an emergency center for military leadership.
The facility earned the informal name 'Harry's Hole' among local residents, referring to President Truman's involvement in establishing this underground military base.
The facility is not open to the public and remains in active use for military purposes, with strict security measures around the site. Visitors without clearance are not allowed to approach the entrance area or take photographs of the secured access points.
On September 11, 2001, this site served as a refuge for senior government officials to ensure continuity of state leadership. Among local residents, the facility was known by an informal name that alluded to President Truman and his role in its establishment.
Location: Pennsylvania
Inception: 1951
Address: Outer Roadway
GPS coordinates: 39.73400,-77.41900
Latest update: December 3, 2025 13:21
This collection brings together underground military sites, strategic bunkers, and highly secured installations across the world. Many of these places were built during the Cold War, when nuclear threats pushed governments to create protected command centers deep under mountains or in remote areas. Some remain active today, serving national security purposes, while others have been decommissioned but preserve their massive concrete structures and tunnels. Though their existence is known from public sources, access remains strictly forbidden. The sites include the Raven Rock Mountain Complex in Pennsylvania, carved deep into the Appalachian Mountains with tunnels stretching for miles through solid rock, and the Cheyenne Mountain Space Force Station in Colorado, where rooms rest on massive springs inside the Rocky Mountains to absorb shocks from potential attacks. In Russia, the Skalisty submarine base serves nuclear submarines through underground piers carved directly into rock along the Barents Sea. RAF Menwith Hill in North Yorkshire spreads across a wide area marked by white geodesic domes that protect satellite antennas, while the Svalbard Global Seed Vault lies embedded in arctic permafrost, storing millions of plant seeds behind thick concrete walls. These places show how governments sought to protect command systems, military operations, and even biological reserves by building deep into mountains or along remote coastlines, creating installations that remain largely hidden from public view.
National Shrine of St. Elizabeth Ann Seton
8.5 km
Pen Mar Park
7.9 km
Fairfield Inn
7.2 km
Victor Cullen Center, Old Administration Building
4.1 km
Jacks Mountain Covered Bridge
4.6 km
Monterey Historic District
4.3 km
Fairfield Historic District
7.8 km
Emmitsburg Historic District
8.4 km
Victor Cullen School Power House
4.3 km
Strawberry Hill Nature Preserve
7.8 km
St. Euphemia's School and Sisters' House
8.6 km
Tipahato
6.7 km
Red Run Lodge
8.4 km
Clermont Crag
5.6 km
Carroll Valley Golf Resort
4.3 km
Monterey Country Club
4.5 km
Teatron
6.9 km
Marion Burk Knott Auditorium
8.3 km
Old Benjamin Omanut
7.6 km
Beach Front
7.4 km
Fr. John Dubois
8.1 km
St. Francis
7.8 km
The Miller Family Visitors Center
7.9 km
Statue, Work of art
7.2 km
Rattlesnake Run Lookout
7 km
Scenic viewpoint
6.7 km
Scenic viewpoint
7.9 km
Reviews
Visited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes