Tall White Northern Bog Orchis The Terraces at Mammoth Hot Springs Gibbon Falls The Bull Steam Vents Fringed Gentians Mammoth Hot Springs The Terraces at Mammoth Thermophilic Algae and Bacteria Porcelain Basin Hooded Ladies'-tresses The Terraces at Mammoth Hot Spring Firehole Falls 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 White Dome Geyser Orange Spring Mound Elephant's Head Lousewort Geyser Runoff Bison Grand Canyon of the Yellowstone Prairie Smoke Morning at Earthquake Lake Showy Phlox Canyon Wren Large-flowered Collomia Sunrise over the Tobacco Root Mountains Western Bluebird Montana: West Mullan Fire Paintbrush Killer Whale American Coot Eastern Washington Haying Time Sunset Post Boxes Sticky Geranium Osprey in Fight