Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

A 300-ship graveyard, with a few still visible at low tide.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A 140-year-old castle with underground caves hidden in San Francisco.

A huge musical instrument played by the ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This massive subterranean fissure is known as the "underground Grand Canyon."

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

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

This unique Renaissance castle was turned into a home for Nazi occultism.

The fairy tale castle of the "fairy-tale king."

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Village situated on a narrow volcanic escarpment.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

A miniature train-ride through Slovenia's largest cave system.