These naturally occurring but rare geological formations are each about the size of a small house.

A winding, blood-red tunnel of hardened lava navigable by foot.

These four small islands contain unique hexagonal rock formations.

An unusual double cinder cone with a bent oval crater, in the Lunar Crater Volcanic Field.

This volcanic crater lake is renowned for its perfectly round shape, stunning blue-green waters, and unique geological properties.

Some 46,000 years ago, a volcanic eruption led to a flooding event that carved this short canyon with steep vertical walls.