 The Porcelain Basin in early morning light at the Norris Geyser Basin in Yellowstone National Park |
 A Porcelain Basin vent steams in the Norris Geyser Basin in Yellowstone National Park |
 Vents and pools on the floor of the Porcelain Basin in the Norris Geyser Basin in Yellowstone National Park |
 The Porcelain Basin in the Norris Geyser Basin in Yellowstone National Park |
 The steaming floor of the Porcelain Basin in the Norris Geyser Basin in Yellowstone National Park |
 Steam fills the morning air in the Norris Geyser Basin in Yellowstone National Park |
 Pools in the Porcelain Basin in the Norris Geyser Basin in Yellowstone National Park |
 Steam clouds fill the air over the Porcelain Basin in the Norris Geyser Basin in Yellowstone National Park |
 The Ledge Geyser lets off steam in the Porcelain Basin at the Norris Geyser Basin in Yellowstone National Park |
 A Porcelain Basin vent sprays water in the Norris Geyser Basin in Yellowstone National Park |
 Steam rises from the earth in the Norris Geyser Basin in Yellowstone National Park |
 A vent in the Porcelain Basin emits water in the Norris Geyser Basin in Yellowstone National Park |
 Early morning in the Porcelain Basin in the Norris Geyser Basin in Yellowstone National Park |
 Algae thrives in the hot water of the Porcelain Basin in the Norris Geyser Basin in Yellowstone National Park |
 Echinus Geyser in the Norris Geyser Basin in Yellowstone National Park |
 A Steamboat Geyser minor eruption in the Norris Geyser Basin in Yellowstone National Park |
 Clouds gather over Cistern Spring in the Norris Geyser Basin in Yellowstone National Park |
 Thunder clouds building over Crater Spring in the Norris Geyser Basin in Yellowstone National Park |
 Veteran Geyser churning in the Norris Geyser Basin in Yellowstone National Park |
 Algae and grasses grow in geyser runoff in the Norris Geyser Basin in Yellowstone National Park |
 Grasses thriving in the warm waters of the Norris Geyser Basin in Yellowstone National Park |
 Algae growing in a pool in the Norris Geyser Basin in Yellowstone National Park |
 Vixen Geyser erupts in the Norris Geyser Basin in Yellowstone National Park |
 Algae growing among rock formations in the Norris Geyser Basin in Yellowstone National Park |
 Puff ‘n Stuff Geyser vents steam in the Norris Geyser Basin in Yellowstone National Park |