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

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

A massive underwater sinkhole made famous by Jacques Cousteau.

A swing to dangle you off the very edge.

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

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

A bizarre house filled with an astounding array of collections.

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

Rippling sand dunes frozen in the Arizona rock.

A magical place that lets you play in and explore the world of Studio Ghibli.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

On Japan's Tashirojima Island, cats are king.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

A Circus legend leaves an unexpected endowment.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

This home is decked out like a psychedelic explosion of colors and bowling balls.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

A secret, rocky playground hidden amongst the plain white beaches of the Florida coast.