The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

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

More than five miles of underground passageways.

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

Pickles belong on pizza and this freewheeling outpost proves it.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

A lush green oasis in the middle of Chicago.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

A river with some unusual, and occasionally dangerous, habits.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.