Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The most isolated mailbox in America lets desert travelers record their passing.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

Physicist’s epitaph provides final confirmation to a career of turmoil.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

One of the world's steepest streets seems to have houses sliding down it.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

The world's first and only natural nuclear reactor.

The remains of a monument in the remote Kazakhstani desert dedicated to the only men to die in outer space, the crew of the Soyuz 11 rocket.

Fonts are born and bred here at the oldest letterpress type foundry in the United States.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

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

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

A roadside spring pooling in an old bathtub where anyone can stop and sip.

In this century-old literary safehouse, print is alive and well.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

The place where the great marine explorer first learned to work underwater is not where you'd expect.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A kaleidoscopic warehouse-maze of handmade neon signs.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

A palatial horse museum outside Shanghai is home to the most pampered horses in the world.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

A whimsical bridge adorned with decorative dragons.