Upper Geyser Basin, Yellowstone Nat'l Park Filename: CEM009920-YellowstoneNP-WY-USA.jpg
Doublet Pool at Upper Geyser Basin, Yellowstone Nat'l Park
Sulphur at Upper Geyser Basin, Yellowstone Nat'l Park Filename: CEM009934-YellowstoneNP-WY-USA.jpg