Crater Lake, Oregon (© Roshin Lal Ramesan)(Bing United States)

[20150522] - 'Crater Lake, Oregon (© Roshin Lal Ramesan)(Bing United States)'

The Colorado River and Marble Canyon, Grand Canyon National Park, Arizona (© Gavin Heffernan/Shutterstock)(Bing United States)

[20150521] - 'The Colorado River and Marble Canyon, Grand Canyon National Park, Arizona (© Gavin Heffernan/Shutterstock)(Bing United States)'

Flower hat jelly in the Monterey Bay Aquarium, Monterey, California (© Frans Lanting/plainpicture)(Bing United States)

[20150520] - 'Flower hat jelly in the Monterey Bay Aquarium, Monterey, California (© Frans Lanting/plainpicture)(Bing United States)'

[20150519] - ''Archie,' a Columbian mammoth specimen at the University of Nebraska State Museum in Lincoln, Nebraska (© Joel Sartore/Getty Images)(Bing United States)'

Mount St. Helens, Washington (© Diane Cook and Len Jenshel/Getty Images)(Bing United States)

[20150518] - 'Mount St. Helens, Washington (© Diane Cook and Len Jenshel/Getty Images)(Bing United States)'

‘Family of Menhirs

[20150517] - '‘Family of Menhirs' by Manolo Paz, A Coruña, Galicia, Spain (© Oscar Dominguez/Tandem Stills + Motion)(Bing United States)'

US Navy F/A-18F Super Hornet creating a sonic boom (© Darek Siusta/REX)(Bing United States)

[20150516] - 'US Navy F/A-18F Super Hornet creating a sonic boom (© Darek Siusta/REX)(Bing United States)'

Black-tailed prairie dogs in Wind Cave National Park, South Dakota (© James Hager/age fotostock)(Bing United States)

[20150515] - 'Black-tailed prairie dogs in Wind Cave National Park, South Dakota (© James Hager/age fotostock)(Bing United States)'

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