An underground city of salt.

Former hotel turned into haunted playground.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

What is the Thing?

A reproduction of earth's many biomes.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A self-built castle made by a mysterious man.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A spiritual vortex among the red rocks in Sedona.

An urban laboratory.

A bizarre house filled with an astounding array of collections.

Macabre astrological automaton clock dating to the late 1400s.

The final resting place of soldiers' loyal canine companions.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

Resting place of Hollywood's immortals is also site of summer film screenings.

The private clubhouse for the members of the Academy of Magical Arts.