Mute swan chicks, Massapequa Preserve, Long Island, New York, USA (© Vicki Jauron/Getty Images)

Hawa Mahal, Jaipur, Rajasthan, India (© Mazur Travel/Shutterstock)

Whangārei Falls, North Island, New Zealand (© Nathan Kavumbura/Getty Images)

Cherry blossoms, Lake Tai, Wuxi, China (© Eric Yang/Getty Images)

Kjeragbolten boulder, Kjerag mountain, Rogaland, Norway (© Angel FAyE/Getty Images)

Goðafoss waterfall, Iceland (© Anton Petrus/Getty Images)

Crested caracaras, Texas, USA (© Alan Murphy/Minden Pictures)

Málaga, Spain (© Sean Pavone Photo/Getty Images)

Ponta Delgada, Madeira, Portugal (© Jan Wlodarczyk/Alamy)

Arvada Skatepark, Colorado, USA (© Jon Paciaroni/Getty Images)

Caracal cubs (© Marion Vollborn/Minden Pictures)

Fiddlehead fern fronds, Quebec, Canada (© Marianna Armata/Getty Images)

Waning gibbous moon from the International Space Station (© NASA)

Mitsumata (Oriental paperbush), Japan (© nattya3714/Getty Images)

Horseshoe Bend, Arizona, USA (© Michael Dunn/Getty Images)

Dartmoor National Park, Devon, England (© AWL Images/Danita Delimont)

Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA (© AirPano LLC/Amazing Aerial Agency)

American robin eggs, New Jersey, USA (© Mira/Alamy)

Square Tower House, Mesa Verde National Park, Colorado, USA (© lightphoto/Getty Images)

Plitvice Lakes National Park, Croatia (© Janne Kahila/Getty Images)

Iceland (© Matthew Kuhns/Tandem Stills + Motion)

Karula National Park, Valgamaa County, Estonia (© Sven Zacek/Minden Pictures)

Victoria Memorial, Kolkata, India (© Roop_Dey/Shutterstock)

Milky Way, Yosemite National Park, California, USA (© Cory Marshall/Tandem Stills + Motion)

King penguins, St. Andrew's Bay, South Georgia (© Paul Souders/Getty Images)

Château de Hunebourg, Bas-Rhin, Alsace, France (© Leonid Andronov/Alamy)

Midnight sun, Svalbard, Norway (© Nature Picture Library/Alamy)

The Great Ridge, Peak District National Park, England (© John Finney Photography/Moment/Getty Images)

Young giant sequoia, Prairie Creek Redwoods State Park, California, USA (© Hutch Axilrod/Getty Images)

Hoopoe, Middle Elbe Biosphere Reserve, Germany (© Slawek Staszczuk/Alamy)