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)

Pueblo ruins, Hovenweep National Monument, Utah (© Alan Majchrowicz/Getty Images)

Chimera of Notre-Dame de Paris, France (© scaliger/Getty Images)

View of Edinburgh Castle from a churchyard in Scotland (© Chris Dorney/Alamy)

Great horned owl (© Mark Newman/Getty Images)

Pumpkin field, Victoria, British Columbia, Canada (© Shaun Cunningham/Alamy)

Polar bear mom and cub, Churchill, Manitoba, Canada (© Design Pics/plainpicture)