This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

The Vatican of the movie industry turned into an actual church.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Spies, love letters, and ghost stories have all left their mark on this home-cum-museum.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

A formerly abandoned mental institute, now back in business.

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

This old cement mine has been used as everything from a mushroom farm to a recording studio.

Commemorating the spot where the famous scientist fed his pigeons.

There must be a pun in this haystack somewhere...

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.