Least chipmunk, Kootenai National Forest, Montana (© Donald M. Jones/Minden Pictures)

Chittorgarh Fort, Rajasthan, India (© chetansoni/Shutterstock)

Devils Tower National Monument, Wyoming (© Laura Hedien/Getty Images)

Keel-billed toucan in Costa Rica (© Juan Carlos Vindas/Getty Images)

Aspen trees during fall, Fishlake National Forest, Utah (© Danita Delimont/Getty Images)

Sea otters, Prince William Sound, Alaska (© Gerald Corsi/Getty Images)

Swing carousel at Oktoberfest, Munich, Germany (© LOOK-foto/Alamy)

Thousand Islands region, St. Lawrence River, US-Canada border (© benedek/Getty Images)

Serpentine stairs of Dunquin Pier, County Kerry, Ireland (© Hugh O’Connor/Getty Images)

Young bull moose in Denali National Park, Alaska (© Grant Ordelheide/TANDEM Stills + Motion)