Castle Geyser | Benny Marty/Shutterstock
Yellowstone's Grand Prismatic | Inger Eriksen/Shutterstock
Yellowstone Lake in Yellowstone National Park | Jess Kraft/Shutterstock
Lower Falls, Grand Canyon in Yellowstone River | Partick Orton/Getty Images
The Blue star spring | kavram/shutterstock
Bison on road, Yellowstone National Park, Wyoming | Daniel Viñé Garcia/moment/getty images
Minerva Terrace, Mammoth Hot Springs | julius fekete/shutterstock
Lamar valley of Yellowstone National Park | Rebecca R Jackrel/Moment Open/Getty Images
Fishing Cone in the West Thumb Geyser Basin | Kris Wiktor/Shutterstock
Old Faithful erupts while tourists watch | f11photo/shutterstock
Mount Haynes and Madison River, Yellowstone National Park | Posnov/moment/getty images