Old Faithful, located in Yellowstone National Park, is one seriously powerful geyser. During one of its regular eruptions, the geyser spews some 3,700 gallons of water up to 184 feet in the air. During that event, the water comes out at about 204 degrees Fahrenheit with steam temperatures up to 350 degrees. So yes, it’s dangerous. But that fact didn’t stop one ill-informed tourist from attempting to stand next to Old Faithful as it erupted.