Geology

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

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

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

A wild west land agreement was etched right onto this historic Idaho stone.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This whimsically named Vietnamese stream is closer to a walkway than a waterway.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

The highest point in Virginia can only be reached by passing through ponies and flowers.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

Unusual, mushroom-like rock formations caused by weathering and water erosion, set to disappear, according to geologists.

This tiny patch of arid sand sits in one of the greenest states in the United States.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.