The Callanish Stones on the Isle of Lewis, Scotland (© Tomas Vrba and Lindsey Parkinson/500px)(Bing United States)

[20170627] - 'The Callanish Stones on the Isle of Lewis, Scotland (© Tomas Vrba and Lindsey Parkinson/500px)(Bing United States)'

Ring-tailed lemurs in the Berenty Reserve of Madagascar (© Steve Bloom Images/Alamy)(Bing United States)

[20170626] - 'Ring-tailed lemurs in the Berenty Reserve of Madagascar (© Steve Bloom Images/Alamy)(Bing United States)'

Rotonda di San Lorenzo in Mantua, Italy (© geo-select FotoArt)(Bing United States)

[20170625] - 'Rotonda di San Lorenzo in Mantua, Italy (© geo-select FotoArt)(Bing United States)'

Swimmers competing in the 2016 Ironman World Championship triathlon in Kailua-Kona, Hawaii (© Tom Pennington/Getty Images)(Bing United States)

[20170624] - 'Swimmers competing in the 2016 Ironman World Championship triathlon in Kailua-Kona, Hawaii (© Tom Pennington/Getty Images)(Bing United States)'

Mooney Falls in Havasu Canyon, Arizona (© Brendan van Son/Tandem Stills + Motion)(Bing United States)

[20170623] - 'Mooney Falls in Havasu Canyon, Arizona (© Brendan van Son/Tandem Stills + Motion)(Bing United States)'

Red fox in Denali National Park and Preserve, Alaska (© Michael DeYoung/Design Pics/Getty Images)(Bing United States)

[20170622] - 'Red fox in Denali National Park and Preserve, Alaska (© Michael DeYoung/Design Pics/Getty Images)(Bing United States)'

Skateboarding at Venice Beach, California (© mgs/Moment/Getty Images)(Bing United States)

[20170621] - 'Skateboarding at Venice Beach, California (© mgs/Moment/Getty Images)(Bing United States)'

Playa Roja in Paracas National Reserve, Peru (© Istvan Kadar Photography/Getty Images)(Bing United States)

[20170620] - 'Playa Roja in Paracas National Reserve, Peru (© Istvan Kadar Photography/Getty Images)(Bing United States)'

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