Mural Wall, Korean War Veterans Memorial, Washington, DC (© Steve Tulley/Alamy)

Caribbean flamingos, Yucatán Peninsula, Mexico (© Claudio Contreras/NPL/Minden Pictures)

Milky Way, Aït Benhaddou, Morocco (© Cavan Images/Getty Images)

Aerial view of glacial rivers in Iceland (© rybarmarekk/Shutterstock)

Vancouver Coastal Sea wolves in Great Bear Rainforest, British Columbia, Canada (© Nick Garbutt/Alamy)

Shi Shi Beach in Olympic National Park, Washington (© T.M. Schultze/TANDEM Stills + Motion)

Autumn sunrise over the National Mall, Washington, DC (© WLDavies/iStock/Getty Images Plus)

Grasmere, Lake District, Cumbria, England (© Thomas Molyneux/Getty Images)

Caribbean flamingo nests, Ría Lagartos Biosphere Reserve, Yucatán, Mexico (© Claudio Contreras/Minden Pictures)

American bison in Yellowstone National Park, Wyoming (© Ian Shive/TANDEM Stills + Motion)