Abandoned railway line circling the city of Paris.

The oldest stone house in Paris was built by its most famous alchemist.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

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

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

An underwater city for the dead.

One person's lost luggage is another person's treasure.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

The small cave that housed Tennessee's "first citizen."

This WWII plane died a quiet death, and is now a garden eel playground.

Submerged lava formations create incredible waterworks.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

An inconspicuous footbridge beloved by San Diego locals.

The remains of a 12th-century chapter house in Golden Gate Park.

Visible below the waves are memorials to the city's Gold Rush dead.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

An essential stop before plundering, BYO Cutlass.

Tiki luxury on Nob Hill.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.