This largely forgotten piece of Cold War history stands hidden in the woods just north of the Mississippi Gulf Coast.

This historic general store still operates much as it did in the late 1800s.

A living antique aviation museum in the historic town of Red Hook, New York.

All that remains of the once-booming chain is a single orange-roofed restaurant.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

A retired subway car stands alone in a field in the middle of Queens.

This airfield is home to a number of retired vintage planes in various states of disrepair.

The world's largest set of the ten commandments lay nestled in the heart of the Great Smoky Mountains.

This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This vast kitty-themed collection illustrates the history of human-cat interaction.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This cannonball stands as a reminder of the final act of a fleeting governor amidst a revolution.

This museum sits on the site of a decommissioned military communications base.

The romance of early commercial flight still fills this Art Deco destination.

The maritime museum that boasts the largest nautical library in the western hemisphere.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

The oddly shaped, steam-spewing building is now an art studio and gallery.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.