The Black Growler, Norris Geyser Basin, Yellowstone Park, Montana, USA, c1900. Creator: Unknown
The Black Growler, Norris Geyser Basin, Yellowstone Park, Montana, USA, c1900. The Black Growler Steam Vent has measured 93 to 138 degrees C
Minerva Terrace, Yellowstone Park, USA, c1900. Creator: Unknown
Minerva Terrace, Yellowstone Park, USA, c1900. There are thought to be about 1, 000 geothermal features in Yellowstone, including geyser basins, hot springs, mud pots, and fumaroles
Hot Springs, Helena, Montana, USA, c1900. Creator: Unknown
Hot Springs, Helena, Montana, USA, c1900. The Hotel Broadwater and Natatorium, built in 1889 by businessman Colonel Charles A Broadwater, an important example of the Moorish style
Mammoth Hot Springs, Yellowstone National Park, USA, 1893. Artist: John L Stoddard
Mammoth Hot Springs, Yellowstone National Park, USA, 1893. Illustration from Portfolio of Photographs of Famous Cities, Scenes and Paintings, (The Werner Company, Chicago, c1893)