Lower Geyser Basin, Yellowstone National Park, as seen from Twin Buttes

Lower Geyser Basin is the largest thermal area in Yellowstone National Park.  The east-northeast view from atop Twin Buttes looks across the basin’s geysers, pine forest, and grasslands to the Central Plateau in the distance.  The small lakes in the foreground and middle ground were cored to reconstruct the environmental history of this active hydrothermal landscape. Photo by Lauren N. Harrison, USGS, September 2022.