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

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

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

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Dad jokes and wordplay abound in this comic fake cemetery.

This unusually circular centenarian barn became a Route 66 icon.

One of the largest Masonic temples in the world, created at the height of the oil boom in ostentatious style.

William Faulkner kept his beloved estate wild and untamed.

The world's longest known cave system.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Where animatronic singing fish go to retire.

148 feet long and in the middle of a verdant forest.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

An abandoned theme park with a strange and tumultuous past.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

The remains of one of the last mining camps developed on the New River.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

An abandoned coal mine reached by a steep hike.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A museum dedicated to the mysterious cryptid.

The largest self-built castle in the U.S., six decades in the making.

This enigmatic building features numerous architectural styles.