The sunset-colored steam cloud of the Excelsior Geyser Crater in Yellowstone National Park, Monday, May 30, 2005. (Kevin Moloney for the New York Times)

The sunset-colored steam cloud of the Excelsior Geyser Crater in Yellowstone National Park, Monday, May 30, 2005. (Kevin Moloney for the New York Times)

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Copyright: (c) Kevin Moloney, 2005
Image Size: 2848x4288 / 786.2KB; national park Yellowstone wildlife landscape environment travel vacation thermal steam geyser fumarole spring volcano volcanic
Contained in galleries: Wyoming

The sunset-colored steam cloud of the Excelsior Geyser Crater in Yellowstone National Park, Monday, May 30, 2005. (Kevin Moloney for the New York Times)