Petrified wood in the Petrified Forest National Park, Arizona (© Ian Shive/Tandem Stills + Motion)(Bing United Kingdom)

[20150329] - 'Petrified wood in the Petrified Forest National Park, Arizona (© Ian Shive/Tandem Stills + Motion)(Bing United Kingdom)'

Nasīr al-Mulk Mosque in Shiraz, Iran (© R.Creation/Corbis)(Bing United Kingdom)

[20150328] - 'Nasīr al-Mulk Mosque in Shiraz, Iran (© R.Creation/Corbis)(Bing United Kingdom)'

Lupine grows in a burned forest at Yosemite National Park, California (© Robb Hirsch/Tandem Stills + Motion)(Bing United Kingdom)

[20150327] - 'Lupine grows in a burned forest at Yosemite National Park, California (© Robb Hirsch/Tandem Stills + Motion)(Bing United Kingdom)'

View of the Eiger from the Grosse Scheidegg mountain pass, Switzerland (© SIME/eStock Photo)(Bing United Kingdom)

[20150326] - 'View of the Eiger from the Grosse Scheidegg mountain pass, Switzerland (© SIME/eStock Photo)(Bing United Kingdom)'

West Indian manatees in the Crystal River, Florida (© Daniel J. Cox/Corbis)(Bing United Kingdom)

[20150325] - 'West Indian manatees in the Crystal River, Florida (© Daniel J. Cox/Corbis)(Bing United Kingdom)'

Supercell storm over West Point, Nebraska (© Mammoth HD)(Bing United Kingdom)

[20150324] - 'Supercell storm over West Point, Nebraska (© Mammoth HD)(Bing United Kingdom)'

Hot-air balloon over Uçhisar in Cappadocia, Turkey (© Coolbriere Photograph/Getty Images)(Bing United Kingdom)

[20150323] - 'Hot-air balloon over Uçhisar in Cappadocia, Turkey (© Coolbriere Photograph/Getty Images)(Bing United Kingdom)'

A ferry passes the Lyngen Alps in Norway (© Laurent Bouvet/Aurora Photos)(Bing United Kingdom)

[20150322] - 'A ferry passes the Lyngen Alps in Norway (© Laurent Bouvet/Aurora Photos)(Bing United Kingdom)'

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