This is either Fishing Cone, Lakeshore, or Big Cone geyser. People were reputed to cook their fish in Fishing Cone. I had been musing about making a good old fashioned disaster movie set in Yellowstone. and those footprints in the sand made me think of one of the shots: The setting is that the entire cauldera is erupting. Right at the beginning, everything appears normal, and here we have someone I labeled Loud Mouthed Jerk (LMJ) ignoring the signs saying KEEP ON THE TRAIL and looking into Fishing Cone. Of course, the cone erupts, and LMJ's head is engulfed in superheated water. Go to close up of LMJ jumping up, his skin boiled off his face - eyeballs milky white like a cooked fish. Still alive, he runs screaming into the lake. At least that is what I'd like to have happen to people who go off the trail and look into things.