Great Sand Dunes National Park and Preserve

Molokini Crater, Maui

Volcano eruption as seen from space.

El Charco del Ingenio - San Miguel de Allende, Mexico

First snow of the season today at the Maroon Bells - Aspen, Colorado

Kayaking Moraine Lake -

Mayon Volcano's Perfect Cone, Philippines

The Matterhorn on a cold evening in October

Reed Flute Cave, China

Northern Lights over Tallinn

Crayfish Falls, Guadeloupe

Torngat Mountains, Labrador, Canada

Shasta Lake from air