Sapphire Pool Bull Elk Early Morning in Porcelain Basin Hot Water Seepage Porcelain Basin Cluster Thistle Lower Falls of the Yellowstone Canary Spring Steamboat Geyser Steamboat Geyser Platanthera x estesii Porcelain Basin Canary Spring Bison Canary Spring The Terraces Dendrobium christyanum Paphiopedilum sukhakulii Dendrobium agathodaemonis Dendrobium cuthbertsonii Restrepia flosculata Masdevallia caudata Epidendrum escobarianum Hot Spring The Terraces at Mammoth Hooded Ladies'-tresses Porcelain Basin Thermophilic Algae and Bacteria The Terraces at Mammoth Mammoth Hot Springs Fringed Gentians Steam Vents The Bull Gibbon Falls The Terraces at Mammoth Hot Springs Tall White Northern Bog Orchis Damselfly White Dome Geyser Orange Spring Mound Elephant's Head Lousewort Geyser Runoff Bison Grand Canyon of the Yellowstone Prairie Smoke Morning at Earthquake Lake