The jewel of Guanacaste Province in northern Costa Rica is the rainforest wilderness called Tenorio Volc.. See more ...

The Rub' al Khali, meaning 'Empty Quarter' in Arabic, is a vast sea of sand. Spreading across 250,000 sq. Spreading across 250,000 square miles, it's the largest area of continuous sand in the world, ...

Our image features a waterline view of an ice floe in Admiralty Inlet off the west coast of Baffin Island. T Our image features a waterline view of an ice floe in Admiralty Inlet off the west coast of ...

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It's hard to fathom the forces of wind and water that created this elephantine formation, especially in th.. See more ...

This sparkling span seems to float over the Ma Wan Channel in Hong Kong SAR, and got its name from .. See more ...

Ponta da Piedade, Portugal© fhm / Moment / Getty Images ...

Rakotzbrücke in Gablenz, Germany© DieterMeyrl / E+ / Getty Images ...

Like nearly every structure in the ancient city of Petra, Ad Deir was carved directly into the sandstone cliff.. See more ...

Nicknamed ‘Thousand Islands,’ this archipelago on the St. Lawrence River at the border of the United .. See more ...

The Platte River begins in western Nebraska and flows across a large portion of the state. For most of its leThe Platte River begins in western Nebraska and flows across a large portion of the state.