Freedom Sunday rally, Soldier Field, Chicago, Illinois, July 10, 1966 (© Bettmann/Getty Images)

French Quarter, New Orleans, Louisiana (© f11photo/Getty Images)

Washington Monument and Capitol Building on the National Mall, Washington, DC (© AevanStock/Shutterstock)

Humpback whales, Maui, Hawaii (© Flip Nicklin/Minden Pictures)

Eben Ice Caves, Upper Peninsula, Michigan (© Dean Pennala/Shutterstock)

Allen’s hummingbird perched on a red kangaroo paw plant (© GypsyPictureShow/Shutterstock)

‘Firefall’ on Horsetail Fall, Yosemite National Park, California (© Jeff Lewis/Tandem Stills + Motion)

Hippopotamus mother and baby, Chobe National Park, Botswana (© jacobeukman/Getty Images)

Igloo at Otaru Snow Light Path Festival, Hokkaido, Japan (© T Photography/Shutterstock)

Achaches lookout, El Valle de la Luna, Chile (© Ignacio Palacios/Getty Images)