Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

One man's vision and a labor of love of many.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

The first spinning jail built in the United States is the only one that still turns.

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Symbolic attempt to overcome the issues of life.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

"Looks so real, it's scary!"

A house carved into a rock in the 1940s.

Less a museum than a bizarre fantasy world created by artists and engineers.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

This charmingly homemade amusement park has been growing for 40 years.

An enormous park-like oasis, full of famous Chicagoans' graves.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

A clear blue swimming hole with hidden caves, still unexplored.