Old Faithfull Geyser in Yellowstone National Park Filename: CEM006020-YellowstoneNP-WY-USA.jpg
Clepsydra Geyser at Lower Geyser Basin in Yellowstone National Park Filename: CEM006025-YellowstoneNP-WY-USA.jpg
Clepsydra Geyser at Lower Geyser Basin in Yellowstone National Park Filename: CEM006029-YellowstoneNP-WY-USA.jpg