This Florida sinkhole hides a rainforest-like micro-environment in its depths.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

Owned by no one but beloved by all, Brownie was a good dog.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

The scuba diving training facility was named for the steam that rises from the cave's chimney.