Women's suffragists who walked from New York City to Washington, DC, to join the National American Woman Suffrage Association parade on March 3, 1913 (© Everett Collection/age fotostock)

Divers at El Pit Cenote, located in Dos Ojos Natural Park, Quintana Roo, Mexico (© Christia Vizl/Tandem Stills + Motion)

Divers at El Pit cenote, located in Sistema Dos Ojos, Quintana Roo, Mexico (© Christia Vizl/Tandem Stills + Motion)

Saguaro cactus flowers, Coronado National Forest, Arizona (© Jack Dykinga/Minden Pictures)

Male mountain bluebird in Yellowstone National Park, Wyoming (© Jason Savage/Tandem Stills + Motion)

Bird's-eye view of Bronte Baths ocean pool outside Sydney, Australia (© Shay Cooper/Media Drum World/Cavan Images)

The Joan of Arc Monument at Riverside Park in Manhattan (© Chase Guttman/Alamy)

Grizzly bear cub relaxing, Cook Inlet, Chinitna Bay, Lake Clark National Park and Preserve, Alaska (© Erlend Krumsvik/Getty Images)

Brightly colored powder for sale during Holi (© Max Bauerfeind/Shutterstock)

Polar bear cubs looking out of their den in Wapusk National Park, Manitoba, Canada (© Robert Harding/Alamy)

Aerial view of Siesta Beach, Siesta Key, Florida (© Julie Palermo/Getty Images)

Sunrise at Angkor Wat in Cambodia (© Sergio Diaz/Getty Images)

A heron perches on a piling at the Salton Sea in California (© Garret Suhrie/Cavan Images)

Portrait of poet Pablo Neruda projected on a building, Santiago, Chile (© Mario Tellez/Anadolu Agency/Getty Images)

Women climbing a stepwell near Amber Fort in Jaipur, Rajasthan, India (© Shanna Baker/Offset)

Lenticular clouds over Mount Rainier, Washington (© Delrious/Shutterstock)

European bee-eaters in the Extremadura region of Spain (© Martin Demmel/Offset)

The Radcliffe Camera, Oxford, England, for Tolkien Reading Day (© Joe Daniel Price/Getty Images)

Aerial view of the Big Sur coastline near Monterey, California (© Blue Planet Archive/Alamy)

Azaleas in bloom at Magnolia Plantation and Gardens, Charleston, South Carolina (© Joanne Wells/Danita Delimont)

Formentor Lighthouse at the tip of Cap de Formentor, Mallorca, Spain (© Lasse Eklöf/DEEPOL by plainpicture)

A European crested tit weathers a storm in Scotland (© Ben Hall/Minden Pictures)

Aerial view of Galešnjak Island on the Adriatic coast of Croatia (© biggunsband/Shutterstock)

At the Kistefos Museum's sculpture park in Norway, the Twist bridges the Randselva River via a multipurpose walkway (© Laurian Ghinitoiu)