Plitvice Lakes National Park, Croatia

© Jan Wlodarczyk/Alamy

White House Ruin at Canyon de Chelly National Monument in Arizona

© Ingo Arndt/Minden Pictures

Glade Creek Grist Mill, Babcock State Park, West Virginia

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Double-crested cormorants over Monterey Bay, California

© Hiroya Minakuchi/Minden Pictures

View of the Sanguinaires Islands from Corsica, France

© Francesco Riccardo Iacomino/Getty Images

Octopus in defensive posture, Mayotte, Indian Ocean

© Gabriel Barathieu/Minden Pictures

Moss-covered rocks in Puzzlewood, Forest of Dean, Gloucestershire, England

© Fulcanelli_AOS/Getty Images

Danxia landform, Zhangye National Geopark, Gansu, China

© Weiquan Lin/Getty Images