Canoeists in Burnaby, British Columbia, Canada (© Christopher Kimmel/Aurora Photos)

Solar eclipse sequence from August 21, 2017 (© Lindsay Daniels/Tandem Stills + Motion)

The Transfăgărășan in Transylvania, Romania (© Calin Stan/Shutterstock)

Peloton during the 2018 Tour de France in Valence, France (© Justin Setterfield/Getty Images)

Calvi citadel, Corsica, France (© Siephoto/Masterfile)

Caribou in Kobuk Valley National Park, Alaska (© Staffan Widstrand/Minden Pictures)

Blue walls of Chefchaouen, Morocco (© Tatsuya Ohinata/Getty Images)

Jaguar in the Pantanal wetlands, Brazil (© Andy Rouse/Minden Pictures)

Visitors on El Caminito del Rey in the province of Málaga, Spain (© Ken Welsh/Alamy)

Earth at night (© NASA)

Cypress tree tunnel at Point Reyes National Seashore in California (© Rachid Dahnoun/Tandem Stills + Motion)

Waterperry Gardens in Oxfordshire, England (© Lauren Hibbit/Danita Delimont)

Leatherback sea turtles in Trinidad and Tobago (© Shane P. White/Minden Pictures)

Mount Fuji and Ushitukiiwa (twin rocks), Matsuzaki, Japan (© Tommy Tsutsui/Getty Images)

A red fox in the grass (© Frederic Desmette/Minden Pictures)

Leatherback sea turtles in Trinidad and Tobago (© Shane P. White/Minden Pictures)

Waterperry Gardens in Oxfordshire, England (© Lauren Hibbit/Danita Delimont)

Garden of the Gods Park in Colorado Springs, Colorado (© lightphoto/iStock/Getty Images)

Saint-Pierre at sunrise, Saint Pierre and Miquelon (© Henryk Sadura/Getty Images)

Hummingbird hawk-moth feeding on flower, Sardinia, Italy (© patriziomartorana/iStock/Getty Images Plus)

Hummingbird hawk-moth feeding on flower, Sardinia, Italy (© patriziomartorana/iStock/Getty Images Plus)

Meerkats in the Kalahari Desert in Botswana (© Aluma Images/Getty Images)

Meerkats in the Kalahari Desert in Botswana (© Aluma Images/Getty Images)

The Cathedral on a stormy morning, Mount Buffalo National Park, Australia (© Ilya Genkin/Alamy)

Aerial view of Elk Falls suspension bridge on Vancouver Island, Canada (© Ink Drop/Alamy)

The shoreline of Gandoca-Manzanillo Wildlife Refuge, in Costa Rica (© Greg Basco/Minden Pictures)

Carhenge, created by Jim Reinders near Alliance, Nebraska (© Charlie Summers/Minden Pictures)

Trillium Lake in Mount Hood National Forest, Oregon (© Frank Krahmer/Getty Images)

Giant tortoises on Alcedo Volcano in the Galápagos Islands (© Tui De Roy/Minden Pictures)

Tree tower in Bavarian Forest National Park, Neuschönau, Germany (© imageBROKER/Alamy)