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

Natural time capsule containing an alien ecosystem.

Continuing the tradition of the dime museum in style.

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

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The world's only museum devoted to the wonders of fluorescence.

Site of a former hidden treehouse in New Orleans.

The ghostly remains of an accidental sea.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

The largest of London's subterranean rivers and once a mad, bad center of London life.

A hand-built folk art installation covered with messages of God's love.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The world's largest collection of witchcraft regalia.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

One man's ambition created this psychedelic log home.

This abandoned Slovenian military barracks has become a punky-political art squat.

An Aztec snake god has taken the material form of an apartment complex.

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

A one-of-a-kind collection of a unique medium.

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

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.