Enormous lake at the bottom of a unique cave system.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

This historic train station has been converted to a locomotive themed hotel.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

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

An abandoned theme park with a strange and tumultuous past.

Home of the International Space Hall of Fame.

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

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

An homage to everyone's favorite prehistoric cartoon family.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

One of the few surviving "Wigwam"-themed motels.

Moonbows over Kentucky.

The world's longest known cave system.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Strange physical sensations and optical contradictions keep visitors coming back for more.

Taxidermy and miniatures come together to create this unique museum.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

You thought Santa Claus didn't exist, but it turns out you were wrong.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.