During an expedition to the Wyoming Territory, Henry D. Washburn observes and names the Old Faithful Geyser.
The Washburn Expedition of 1870 explored the region of northwestern Wyoming that two years later became Yellowstone National Park. Led by Henry D. Washburn and Nathaniel P. Langfor…
During an expedition to the Wyoming Territory, Henry D. Washburn observes and names the Old Faithful Geyser.