Dungeon Provincial Park, Newfoundland and Labrador, Canada (© Kaitlyn McLachlan/Getty Images)

Ceiling of the Temple of Esna, Egypt (© Nick Brundle Photography/Getty Images)

Fireflies glowing above a stream, Okayama Prefecture, Japan (© tdub303/Getty Images)

Liberty Bell and Independence Hall, Independence National Historical Park, Philadelphia, Pennsylvania (© f11photo/Shutterstock)

Lavender rows, Plateau de Valensole, Provence, France (© Robert Harding/Shutterstock)

Syracuse at sunset, Sicily, Italy (© Balate Dorin/Getty Images)

Plate-billed mountain toucan with orchids, Ecuador (© Murray Cooper/Minden Pictures)

Sunrise at Lake Atitlán, Guatemala (© shayes17/Getty Images)

Rice fields at Sapa, Lào Cai, Vietnam (© Anujak Jaimook/Getty Images)

Aerial view of land and ocean, Victoria, Australia (© Nearmap/Getty Images)

Port de Saint-Goustan, Auray, Brittany, France (© Rolf E. Staerk/Shutterstock)

Katahdin Woods and Waters National Monument, Maine (© Cavan Images/Offset/Shutterstock)

Antelope Canyon on the Navajo Nation, east of Page, Arizona (© Mark Skalny/Getty Images)

Lemon shark pup in mangrove forest, Eleuthera, Bahamas (© Shane Gross/Nature Picture Library)

Marie Lake, John Muir Wilderness near Bishop, California (© Steve Dunleavy/Getty Images)

Navy Pier, Chicago, Illinois (© Christopher.F Photography/Getty Images)

Sunbeds on the beach at Vai, Crete, Greece (© borchee/Getty Images)

Devil's Bridge in Rhododendron Park Kromlau, Saxony, Germany (© Mike Mareen/Getty Images)

Barn swallows of different subspecies resting together (© Oscar Dominguez/Tandem Stills + Motion)