Cyclists in the 2013 Tour de France, Corsica, France (© Pascal Pochard-Casabianca/AFP via Getty Images)

San Francisco City Hall lit up in rainbow lights for Pride, California (© Josh Edelson/AFP via Getty Images)

Female Anna's hummingbird, Canada (© Devonyu/iStock/Getty Images)

Bicycles in Copenhagen, Denmark (© Alphotographic/Getty Images)

Chestnut-headed bee-eaters, Bardia National Park, Nepal (© PACO COMO/Shutterstock)

Masoala National Park in Madagascar (© Dennis van de Water/Shutterstock)

Les Braves monument on Omaha Beach, Normandy, France (© Christopher Furlong/Getty Images)

Family of humpback whales, Dutch Harbor, Alaska (© Jude Newkirk/Amazing Aerial Agency)

Skyline of Downtown Montreal, Quebec, Canada (© benedek/E+/Getty Images)

Bardenas Reales Biosphere Reserve and Natural Park, Bardenas, Navarra, Spain (© Aliaume Chapelle/Tandem Stills + Motion)

Osaka at night, Japan (© wichianduangsri/Getty Images)

Southern gemsbok in the savanna, Botswana (© Karine Aigner/Tandem Stills + Motion)

Milky Way over Big Bend National Park, Texas (© wisanuboonrawd/Adobe Stock)

Mosaic façade in Registan Square, Samarkand, Uzbekistan (© da-kuk/Getty Images)

Peggy's Cove Lighthouse, Nova Scotia, Canada (© Pugalenthi/Getty Images)

Surfer riding a wave in Nazaré, Portugal (© Rui Caria/Getty Images)

Red fox father and kit, Washington (© Chase Dekker/Minden Pictures)

Green-crowned brilliant hummingbird with giant thistle, Cerro de la Muerte, Costa Rica (© adrian hepworth/Alamy)

Lupine fields and church at sunrise, Snæfellsnes Peninsula, Iceland (© Matteo Colombo/Getty Images)

Reticulated giraffe mother greeting calf, Lewa Wildlife Conservancy, Kenya (© Sean Crane/Minden Pictures)

Kokino, an ancient megalithic observatory, North Macedonia (© stoimilov/Shutterstock)

Interior exhibits of the Canadian Museum of History (© Inspired By Maps/Shutterstock)

Amazon rainforest, Brazil (© Claus Meyer/plainpicture)

Aerial view of a roundabout in Dhaka, Bangladesh (© Azim Khan Ronnie/Amazing Aerial Agency)

Volcanic crater lakes on Kelimutu, Flores, Indonesia (© Shane P. White/Minden Pictures)

The Fire Wave, a rock formation in Valley of Fire State Park, Nevada (© Clint Losee/Tandem Stills + Motion)

Juvenile Banggai cardinalfish with sea anemone, Lembeh Strait, North Sulawesi, Indonesia (© Constantinos Petrinos/NPL/Minden Pictures)

Duomo Santa Maria del Fiore at dusk, Florence, Italy (© Elena Pueyo/Getty Images)

Pride flags at Christopher Street Park, Stonewall National Monument, New York City (© Noam Galai/Getty Images)

Stone carving at a temple in Ubud, Bali, Indonesia (© R. Schönebaum/plainpicture)