It stinks like sulfur. It is hot enough to cook you. It is so acidic that the vapors have eaten the storm drain grates in the parking lots, even the actual parking lots in some places. But, wow. It is really cool.
The Mud Volcano and the West Thumb Geyser Basin bubbled, burped, steamed and boiled from mud pots, hot springs, and pools. We took a couple ranger led walks and got the whole scoop on why this all happens here. It is the Hot Spot, you know! It is all very fascinating. Memorable too, I can still taste the sulfury smell that has permeated my sinuses. Our ranger, Guida, assured us that it can’t hurt us. She has been is this park 42 seasons and shows no ill affects.