The Wave, Arizona, USA

Dunglen, Co. Antrim, Northern Ireland.

Tree Tunnel, Sena de Luna, Spain

Tinayguk River, Alaska, by Melford

Geiser Black Rock Desert, Nevada

Upper Antelope Slot Canyon, Arizona

Underwater river

Milford Sound, New Zealand

Natural Bridges State Beach - Santa Cruz, CA

Waterfall at Plitvice Lakes National Park, Croatia

Little Cedar Creek, Flatside Wilderness, Arkansas

The Sphinx Observatory at Jungfraujoch, Switzerland provides stunning views of both the heavens and the earth.

Green Mountains, China