Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Ride the subways of yesteryear.

An extensive collection of ancient Egyptian artifacts and mummies.

Be it nature, art, or abandoned military architecture this eclectic German "museum" has you covered.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Pluto is still considered a planet in Ithaca, New York.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Volunteer-run library dedicated to exploring five decades of activism history.

"Only the devil could play golf here."

This Southern Californian Conservation Center is home to singing and howling apes.

A house built from trash known as the poor man's Hearst Castle.

A hotel and restaurant serving as the mecca of kitsch.

A remote crossroads honoring a fallen talent.

A dwindling menagerie of anthropomorphic oil derrick animals still dot the barren California landscape.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

The library of every book lover's dreams.