Moonbows over Kentucky.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

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

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

Even Henry David Thoreau found this glacial pothole irresistible.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Over 100 million years ago, beach-bound dinosaurs left permanent marks on San Antonio's landscape.

According to local lore, this narrow passageway through two large rocks was accidentally created by the devil himself.

The eerie ruins of a remote abandoned hamlet said to be founded by the survivors of a shipwreck.