More than five miles of underground passageways.

Every January 6, young men dive into Spring Bayou in search of a cross and a year's worth of maritime blessings.

World's largest magnetic research facility.

The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

Just below the surface, shrimp are producing temperatures hotter than the sun.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

Bizarre and inspired combination store selling only two items: tires and bibles.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

The bones of an old zoo crumbling in the shadow of a new one.

Abandoned concert venue legendary for its rock counterculture.

A psychedelic labyrinth on the San Francisco bay.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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