Sponge Geyser sends steam from a low, reddish mineral cone in Yellowstone National Park, with a forested hillside behind it and a pool of water at its base. It is a small geyser in the Upper Geyser Basin, where sinter terraces and runoff channels are tinted by mineral deposits and heat-loving organisms.
Linen texture; white border; 5A-H501 Curteich job/code number printed vertically at right edge.
No postmark. Divided-back linen-texture Curteich "C.T. Art-Colortone" card with white border; unused, no handwriting, no address.
Cite this card
Sponge Geyser, Yellowstone National Park, Wyoming, circa 1935, postcard, c. 1935. PostalPast Collection. https://postalpast.com/postcard/sponge-geyser-yellowstone-national-park-wyoming-circa-1935. Accessed November 2, 2026.
