Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

Home of an evil witch famous within southern folklore.

One of the world’s largest living advertisements is made out of pine trees.

A large collection of motorbikes with some impressive gems.

This naturally-sourced hot spring is now home to a clothing-optional resort.

The remains of the first public diamond mine in Arkansas.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

This freshwater spring fills with 10,000 gallons of water per minute.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

Mile-long cave system near Great Smoky Mountains.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Railroad came. People came. Railroad left. Town died.

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

Mysterious glowing orbs float through the desert night.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

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

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The world's longest known cave system.