This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

The only diamond mine in the world where you can keep what you find.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A half-size replica of the World Trade Center towers above Tulsa.

Sid Vicious famously punched a hole in the wall of this iconic music venue.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

An acoustic anomaly with a mysterious cause.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

This museum houses artifacts from American adventurers and filmmakers Martin and Osa Johnson.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

To find the "unicorns of the deep" you've got to go downstairs.

These pretty kitties killed and ate as many as 135 railway workers.

The Bong-area park police have asked visitors to please, stop stealing the signs.

This striking art museum holds an amazing series of curiosity cabinets.

A place to eat for on-the-run agents and espionage enthusiasts.

This cave holds a surprisingly colorful variety of geological oddities.

A bizarre house filled with an astounding array of collections.

Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.