Medicine Lake in Glacier National Park

Dunglen, Co. Antrim, Northern Ireland.

Delicate Arch, Arches Nation Park

Sunrise at Crater Lake

An amazing landscape in Hungary

Taken near the end of De Lacy Creek, Yellowstone

Jenolan Caves, Blue Mountains, NSW, Australia

The sky in the ground. Yellowstone National Park

White Pocket, Arizona

The Bungle Bungles in Purnululu National Park, Australia

Old Faithful, Yellowstone National Park

Rio Celeste, Costa Rica

Lost Mine Trail Chisos Mountains - Big Bend National Park, Texas