An 18th-century Spanish watchtower made entirely of seashell and concrete.

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.

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

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Stay in a room with a view... of the bottom of the ocean.

This shop also boasts some sweet memorabilia from "Willy Wonka and the Chocolate Factory."

In memory of the 110 victims of ValuJet Flight 592 that crashed in the Everglades.

With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

The timeworn "Yankee Stadium" of the fastest game in the world isn't going anywhere.

An underwater city for the dead.

Neglected resting place of some of the city's early luminaries—and a woman encased in concrete.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

Hidden in the plaza next to a pizza shop is an amazing little oddities shop.

Lost subway station nestled beneath Toronto's busy commuter line.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

Museum of stuffed gophers set up in various scenes.

Eclectic musical collection ranging from hurdy gurdies and orphicas to the Rolling Stones Mobile Studio.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

Canada shows its hockey pride with a giant stick.

A floating McDonald's built for Expo '86 is now a derelict relic on Burrard Inlet.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.