Did you know you can not only see Old Faithful erupt on your computer screen but can call on your phone to learn when the next eruption is predicted to take place? Of course, cell phone use is iffy in the park, but Verizon phones seem to do better than most other types (and I have AT&T, which works in some parts of the park).
If you want to try it, call (307) 344-2751. You’ll get the Old Faithful Visitor Education Center and then be instructed to dial “one” for the geyser prediction time. To watch the eruption on your computer, use: http://www.nps.gov/archive/yell/oldfaithfulcam.htm.
Of course, when I’m in the park I’d rather know when Great Fountain or Grand Geyser is going to erupt, since those are my favorites. I’ll be going that way again in a couple of weeks. Counting the days!