During the Show: Yellowstone National Park, September 2003 We had to wait nearly two hours for the show to begin. But once it had started, we were treated to quite the show. Echinus Geyser, unlike other geysers like Old Faithful, doesn’t erupt in a continuous stream. Instead it erupted with an amazing amount of steam and bursts of water, which traveled several feet in the air before crashing back down into the water in the pool creating waves which radiated away from the geyser’s center. It was a fabulous display and well worth the wait.