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

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

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

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

An enormous, inside-out glass globe built in 1935.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A strange house built only at night, with rumored mystic inspiration.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

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

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

A 16th-century horror show built in a lovely Italian garden.

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

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

A massive underwater sinkhole made famous by Jacques Cousteau.

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

A bizarre house filled with an astounding array of collections.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

On the Oregon coast there is a natural hole that seems to be draining the sea.

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

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.