Yellowstone National Park

Yellowstone National Park is just north of Grand Teton National Park. The first geyser I stopped at in Yellowstone was Old Faithful. Old Faithful erupts every hour to hour and a half, and it can be predicted to within about ten minutes. When I parked my car, there was a huge crowd surrounding the geyser so I figured it was about to go off, and it did. Here's a photo.

Apparently, before Old Faithful got to be a tourist attraction, it was used as a laundry.

"Old Faithful is sometimes degraded by being made a laundry. Garments placed in the crater during quiescence are ejected thoroughly washed when the eruption takes place. Gen. Sheridan's men, in 1882, found that linen and cotton fabrics were uninjured by the action of the water, but woolen clothes were torn to shreds.[*]"

* Winser, Henry J. (1883). The Yellowstone National Park-A Manual for Tourists. New York: G.P. Putnam Sons. p. 46

[Note: Although this looks like I was scholarly, in fact, I didn't consult the old Manual for Tourists. Instead, I got the quote and the footnote from Wikipedia so it's not necessarily a definitively sourced quote. It's just cute.]

There are lots of geothermal features in the park. Here are a few more photos.

One of the rangers mentioned that the clearer the water is, the hotter it is. So the above hot spring must be quite hot.

The next hot spring wasn't impressive as a photo, but the video says it's boiling water.



Here's a constant geyser.