Bunkers

Under Hanoi’s medieval citadel sits a secret military headquarters from the final years of the Vietnam War.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

Deep in the limestone cliffs of the Alabaster Coast, a German fortress built during World War II.

Climb into Albania's communist history while enjoying a spectacular ocean view.

An abandoned World War II bunker is part of a chain that runs throughout Washington.

Air-raid tunnels hidden beneath this opulent hotel provided shelter and an escape route—and one of the world's longest slides.

This fortress was designed to prevent a Nazi invasion but was never used.

A former special storage facility for documents during the Cold War.

Nearly three tons of weapons from the Vietnam War still remain in this small, hidden museum.

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.

Fortifications built for a Soviet invasion that never came now sit abandoned in a losing battle against nature.

This subterranean town of over 50 dwellings lies thirty feet beneath the Earth's surface.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

This railroad track was so secretive that it was omitted from all maps.

Deep in the forest next to Augsburg are abandoned bunkers and bullet traps from the region's military past.