One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Take a drunken tour inside the world's largest known geode.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This frequently-photographed waterfall takes only a short hike to visit.

An underwater city for the dead.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

Hollowed out cedar log tubs set in an ancient towering forest.

A heavenly experience, right here on Terra Firma.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

The atmospheric road was never meant to be so creepy.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Odd outsider art installations surround a Gold Rush-era ghost town.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

Rainbow-hued local gem in Venice.

The most visited, and possibly most controversial, museum in Germany.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Towering basalt columns, a creation of fire and ice.