Fine dining in the bizarre world of Lewis Carroll.

The final resting place of New Orleans' most famous voodoo priestess.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

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

A battle between nature and architecture in the Cambodian jungle.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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

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

A fiery crater has been burning in the Karakum Desert since 1971.

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

The sign at the garden gate reads: "These Plants Can Kill."

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

World's first "penitentiary," meant to be humane, drove men insane.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

Ruins of a German Castle on top of a towering stone pillar.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Europe's largest natural bridge has a 19th century royal chateau built into its side.