The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

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

At 207 feet, one of the world's longest continuous escalators.

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

An old slaughterhouse now holds the largest collection of pig artifacts.

A former major munitions plant that has been converted into a sprawling art space.

The site of the climactic scene from the classic horror film is now a historic landmark.

The national park was once a plantation estate.

An overlooked memorial honoring the local Washington residents who died in World War I.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

An office built to look like a giant basket.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.