The only theatre in the world constructed specifically for sound movement.

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

A psychedelic labyrinth on the San Francisco bay.

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

A winding path built in secret on the edge of the continent.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Tucked in the back of this amazing antique store is an important piece of medical history.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

This (occupied) house is 10 feet wide and full of spite.

This is the house that spite built.

Narrowest house in Boston.

This tiny home built on revenge appears to be scarcely wider than a Volkswagen.

The narrowest house in America is seven feet of pure spite.

Beirut's thinnest building was the result of feuding brothers.

This picturesque abandoned home is rumored to be a spite house.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

A rare opportunity to drive across the ocean floor.

Take a sea tractor to the Art Deco hotel on the island that inspired Agatha Christie.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

The Atlantis of Cape Cod reemerges during the lowest of tides.