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)(Bing United States)

Fairy chimneys and cave dwellings in Uçhisar, Cappadocia, Turkey (© Ivan Kmit/Alamy)(Bing United States)

Spectral tarsiers in a ficus tree in Tangkoko Batuangus Nature Reserve, Indonesia (© Ondrej Prosicky/Shutterstock)(Bing United States)

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

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

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

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

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

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

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

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

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

Blooming cherry trees in the Jerte Valley, province of Cáceres, Spain (© Westend61/Getty Images)(Bing United States)

The Circle Bridge in Copenhagen, Denmark (© Lingxiao Xie/Getty Images)(Bing United States)

Pemaquid Point Light in Maine's Damariscotta region (© Tom Whitney/Adobe Stock)(Bing United States)

Shakespeare's handwriting from the play 'Sir Thomas More,' British Library, London (© British Library/Alamy)(Bing United States)

Knowth burial mound in the Boyne Valley, Ireland, for St Patrick's Day (© whatapicture/plainpicture)(Bing United States)

NASA astronaut works on the International Space Station during a spacewalk in 2006 (© NASA)(Bing United States)

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

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

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

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

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

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

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

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

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

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

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

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

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