Craters

This color-changing crater lake in El Salvador is occasionally impenetrable to sunlight.

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.

Two geologically young and nearly circular volcanic subsidence craters, each about a half-mile in diameter, abruptly break the nearly featureless Snake River Plain.

This lake with an inactive volcano underneath is often said to be bottomless.

This "hill without a hilltop" has become a famous public pilgrimage site during Holy Week.

A volcanic crater that visitors can look inside.

Colorado's only active volcano last erupted around 4,000 years ago.

Despite the name, it's unclear if this small depression in northern Nye County was actually caused by falling space debris.

Two craters, which probably erupted within the last 1,500 years and are now filled by alkaline lakes, represent Nevada's youngest known volcanic activity.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

Legend says this remote, “bottomless” lake was created by a curse.

One of the best-preserved impact craters on the planet is located in the middle of the Sahara Desert.