Rainbow over Cathedral Rock: Sedona, AZ, USA

Urupukapuka Island, NZ

Bryce Canyon, Utah

Stunning pic of Monument Valley. (does anyone know how this was formed?)

Underwater river

Ocqueoc River, Presque Isle County, Michigan

Sunset on Westing beach, Unst, Shetland, UK

Great Sand Dunes National Park and Preserve

Beach in South Australia

A rich view of Earth

Torres del Paine, Chile

Athabasca Glacier, Alberta, Canada

Erosion on the slopes of a volcano near Ankisabe, Madagascar