Too close for comfort! Members of Ferdinand Hayden’s Survey stand precariously close to @YellowstoneNPS Old Faithful Geyser erupting, circa 1878 — USGS

Too close for comfort! Members of Ferdinand Hayden’s Survey stand precariously close to @YellowstoneNPS Old Faithful Geyser erupting, circa 1878. Photo credit: William Henry Jackson

More on the early surveys can be found here: https://pubs.usgs.gov/circ/1050/pdf/CIRC1050.pdf?utm_source=twitter&utm_medium=social&utm_term=71d2e8e7-ca66-42be-8e2e-884d17ed9d62&utm_content=&utm_campaign=usgs.

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