In the early days of the park, tourists had free rein to go wherever they wished. Some wrote their names into the formations or tossed logs into the mouths of geysers. These are warming their feet in the thermal waters of Great Fountain Geyser.
Source:
Yellowstone National Park
Episode:
Episode Two: 1890-1915
Associated Park:
Yellowstone National Park
Era:
1900-1920