Like the last picture I posted, Castle Geyser is another one of those spectacular sights you are lucky to see. It erupts 1-2 times a day, and when it does it sure as hell does. Lasting +/-20 minutes, we stumbled across it shortly after it began erupting. Because it is the same area as Old Faithful (in fact you can see Old Faithful from this geyser) it attracts a huge crowd when it goes off.

Summer 2010
Upper Geyser Basin / Yellowstone National Park, Wyoming