Roques de Benet, Els Ports Natural Park, Catalonia, Spain (© Sergi Boixader/Alamy)

Wahclella Falls in the Columbia River Gorge, Oregon (© Eric Vogt/Tandem Stills + Motion)

Traffic circle and highway in Bangkok, Thailand (© Avigator Fortuner/Shutterstock)

Arenal Volcano seen from Monteverde, Costa Rica (© Lukas Bischoff/Getty Images)

Leopard in a tree, Kruger National Park, South Africa (© Tonino De Marco/Minden Pictures)

Modica, Sicily, Italy (© Sandro Bisaro/Getty Images)

Women’s suffrage parade on Fifth Avenue, Manhattan, New York City, October 23, 1915 (© Bettmann/Getty Images)

Eurasian red squirrel (© Westend61/Getty Images)

Bamburgh Castle, Northumberland, England (© Blackbeck/Getty Images)

Polar bear cubs playing, Kaktovik, Alaska (© Piriya Photography/Getty Images)