A pair of mule deer (Odocoileus hemionus) grazing on a hillside in Yellowstone National Park, Wyoming, United States of America, North America

photography horizontal color image travel destinations travel yellowstone national park famous place national park north america usa unesco world heritage site wyoming mule deer deer animal hill landscape outdoors day wildlife animals in the wild no people two animals grass fallen tree grazing side view wild travel destination tourist destination tourist destinations outdoor outside nobody no one no person hills physical geography daytime