* Astronomy

Old Faithful is a cone geyser located in Wyoming, in Yellowstone National Park in the United States. 
On the afternoon of September 18, 1870, the members of the Washburn-Langford-Doane Expedition travelled down the Firehole River from the Kepler Cascades and entered the Upper Geyser Basin. The first geyser they saw was Old Faithful. 
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