A school of barracuda circles a diver in Papua New Guinea.

Photo and text reprinted from @NATGEO: The Most Popular Instagram Photos

Photo: "Lovely Monster Over the Farm" by Camille Seaman

A storm cloud over a farm in Lodgepole, NE, June 22, 2012.

Photo: Doug Marshall/Getty Images

A lone skier makes first tracks down the pristine terrain of the Selkirk Mountains in Canada.

Photo: Carsten Peter/National Geographic Creative

A climber scales Moon Hill, an arch from the remains of a collapsed cave, in Guangxi, China.

Photo: Babak Tafreshi/National Geographic Creative

A meteor and star trails, centered on Polaris, in setting moonlight at Desert View, Grand Canyon National Park, Arizona.

Photo: Frans Lemmens/Getty Images

Two nomads with their camels travel through the seemingly endless sand dunes of the Sahara desert.
Buildings in New York City seen above the clouds.
Adam LeWinter

Photo: James Balog/Aurora Photos

Extreme Ice Survey team member Adam LeWinter overlooks Birthday Canyon, Greenland Ice Sheet, Greenland, 28 June 2009.

Photo: Rob Broek/Getty Images

A close-up view of water pounding down the 196-foot tall Skogafoss falls in Skogar, Iceland.

An aerial view of a beach in Spain.

"Benidorm #1 Spain," 2010 © Edward Burtynsky, courtesy Nicholas Metivier Gallery, Toronto / Howard Greenberg Gallery and Bryce Wolkowitz Gallery, New York

Photo: James Bian

Sunset at Xingping, China.
A huge ocean storm in Porto, Portugal, January 2013.

Photo: Westend61/Getty Images

Old growth sequoia trees tower overhead at the Redwood National Park in California.

Photo: Ryan Deboodt, Oxalis.com.vn

An explorer stands in the dark magnitude that is the Son Doong Cave in Phong Nha-Ke Bang National Park in Vietnam. The cave is so massive it's home to a jungle, has its own localized weather system and can fly a 747 though its largest cavern.

Photo: Danita Delimont/Getty Images

A colossal storm cell lights up the sky over Tucson, Arizona.