Emerald Lakes ~ Tongariro National Park, New Zealand
Taal Volcano, Philippines
Crater LAke off of the Pacific Crest Trail..The PCT...not sure if its CAlifornia or Oregan?
Coastal Potholes by David Thompson. Appears to be the beach near San Diego / La Jolla, California
This stunning view of the half-mile-wide Victoria Crater was taken Oct. 3, 2006. The Mars rover Opportunity, which arrived at Victoria five days before this image was taken, is perched at the crater's edge (below). Opportunity explored Victoria crater until August 2008
An aerial view of Nabiyotum Crater in Lake Turkana – the world’s largest desert lake and the world’s largest alkaline lake...