Elk Elk Grand Canyon of the Yellowstone from Artist Point Lower Geyser Basin, Yellowstone National Park Little Firehole River, Yellowstone National Park Steamboat Geyser, Norris Geyser Basin, Yellowstone… Norris Geyser Basin, Yellowstone National Park Norris Geyser Basin, Yellowstone National Park Grotto Geyser, Yellowstone National Park Lupine Firehole River, Yellowstone National Park Hot Spring, Yellowstone National Park Mammoth Hot Springs, Yellowstone National Park Opal Terraces, Mammoth, Yellowstone National Park Firehole River, Yellowstone National Park Norris Geyser Basin, Yellowstone National Park Norris Geyser Basin, Yellowstone National Park Lower Falls, Yellowstone River from Inspiration Po… North Yellowstone Riverside Geyser, Upper Geyser Basin, Yellowstone… Firehole River, Yellowstone National Park Yellowstone River, Yellowstone National Park Mammoth Hot Springs, Yellowstone National Park Mammoth Hot Springs, Yellowstone National Park Mammoth Hot Springs, Yellowstone National Park Mammoth Hot Springs, Yellowstone National Park Piperia unalascensis Orange Spring, Mammoth Hot Springs, Yellowstone Na… Blue Penstemon (Penstemon cyaneus) Saffron Ragwort (Senecio crocatus) Sulphur Flower (Eriogonum umbellatum) Blue Penstemon (Penstemon cyaneus) Blue Penstemon (Penstemon cyaneus) Blue Penstemon (Penstemon cyaneus) Elegant Lupine (Lupinus lepidus) Sunset over Norris Geyser Basin, Yellowstone Natio… Fountain Paint Pots, Yellowstone National Park Round-headed Desert Buckwheat (Eriogonum sphaeroce… Fountain Paint Pots, Yellowstone National Park Firehole Cascades Midway Geyser Basin, Yellowstone National Park Midway Geyser Basin, Yellowstone National Park Fringed Gentians Black Sand Basin, Yellowstone National Park Black Sand Basin, Yellowstone National Park