This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

Little did a museum know, they possessed the last-known lunch wagon in existence.

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

The famous Beatle secretly visited this Illinois town several times to visit his sister.

An enormous natural sandstone bridge in Kentucky.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Prehistoric animals decorate this popular outdoor park.

Moonbows over Kentucky.

The world's longest known cave system.

This former Indiana quarry has been transformed into a park and SCUBA site where divers can explore the drowned mining equipment.

The first artificial white water river course in North America cuts right through an Indiana city.

A humble homemade ride attracts visitors from around the globe to this small Midwestern town.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

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

If astronomy had a ghost, it would look like this observatory.

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