RHH's photos with the keyword: sulfuric acid

Sour Lake gets its name from the sulfuric acid that is formed in the lake by microorganisms that produce the sulfuric acid when they feed on the sulfur in the lake. The water in the lake, though pleasantly hot, would take your skin off with its acidity.

Sour Lake is at the back of the Mud Volcano area of Yellowstone National Park. It is about the temperature of bathwater but would take off your skin since it is full of sulfuric acid. It is reached by a short trail from the parking area.