Great Smoky Mountains National Park, Tennessee (© Tony Barber/Getty Images)

Coral reef in Marovo Lagoon in the Solomon Islands (© WaterFrame/Alamy)

Buckingham Palace in London, England (© Pajor Pawel/Shutterstock)

Cycling across a natural rock arch in the desert near Moab, Utah (© Whit Richardson/Cavan)

Banner Peak and Thousand Island Lake, Ansel Adams Wilderness, California (© Michael DeYoung Photography/Tandem Stills + Motion)

Rapa Valley in Sarek National Park, Sweden (© Alena Vishina/Alamy)

An indigo bunting at the John James Audubon Center at Mill Grove in Audubon, Pennsylvania (© Vicki Jauron/Getty Images)

Haaga Rhododendron Park, Helsinki, Finland (© Samuli Vainionpää/Getty Images)

Long-beaked common dolphin pod and diving Cape gannets hunting sardines off the Eastern Cape, South Africa (© Pete Oxford/Minden Pictures)

Sweetheart Abbey, Dumfries and Galloway, Scotland (© Westend61/Getty Images)

Poppies in bloom, Moravia, Czech Republic (© rusm/Getty Images)

Misool Island, one of the four major islands in the Raja Ampat Islands in West Papua, Indonesia (© Elsy Saldek/Getty Images)

Cliffs of the Sierra Ponce and Rio Grande, Big Bend National Park, Texas (© Tim Fitzharris/Minden Pictures)

Elephant walking in the Okavango River, Botswana (© Markus Pavlowsky/Getty Images)

The Metropolitan Museum of Art in New York City (© Susanne Pommer/Shutterstock)

Seungseon Bridge at Seonam Temple in Jogyesan Provincial Park, South Korea (© Aaron Choi/Getty Images)

Balsamroot wildflowers bloom below the Teton Mountains in Grand Teton National Park, Wyoming (© Mike Cavaroc/Tandem Stills + Motion)

Surfers catching waves at Palm Beach on the Gold Coast, Queensland, Australia (© Darren Tierney/Getty Images)

Southern cassowary father with chicks, Kuranda, Queensland, Australia (© Martin Willis/Minden Pictures)

Old World swallowtail butterflies on a flower (© Alberto Ghizzi Panizza/Getty Images)

View of Glastonbury Tor from Walton Hill, Somerset, England (© Guy Edwardes/Minden Pictures)

Yasuní National Park in Amazonian Ecuador (© Paul Bertner/Minden Pictures)