Blue-Green Algae bloom, Lake Erie, US

Vermillion Lakes, Canada

West Glacier National Park, Montana

Reed Flute Cave, Guilin, China

Aigualluts Cascade in Benasque Valley of the Pirineo Mountains in Spain

Garibaldi Lake, BC, Canada

"Colors of Antelope" - Antelope Canyon

Crater Lake, Crater Lake National Park, Oregon

Beauty Creek, Jasper National Park, Alberta, Canada

The sky in the ground. Yellowstone National Park

Little village Oberhofen, Switzerland

Geiser Black Rock Desert, Nevada

Iliamna Volcano, Alaska. Photo by Michael Melford