One our Wanda's must sees was the Old Faithful Inn.
This one had an interesting bubbling, gurgling, hissing sound.
The colors in the runoff is caused by thermophiles, heat tolerant bacteria.
The colors changed based on the water temp.
This geyser went off while we were at Black Sand Geyser Basin and continued for about 15 min. The height varied from 1-5' tall during the eruption.
Another night in another State.