World War II-era Nazi compound nestled in the Santa Monica hills.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Site of a former hidden treehouse in New Orleans.

The abandoned Japanese amusement park once loomed as a dystopian Disneyland.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A crumbling hospital from the 1850s on Roosevelt Island.

Medicinal spa created with the discharge from a geothermal energy plant.

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

Macabre astrological automaton clock dating to the late 1400s.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A toxic ghost town sitting atop a massive coal fire.

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

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.