United States, view of Old Faithful geyser at Yellowstone National Park

Wyoming: Old FaithfulOld Faithful is one of several geysers located in the Upper Geyser Basin. It 'currently erupts around 17 times a day.. .' and '...can vary in height from 106 to 184 feet.' 'Eruptions normally last between 1.5 to 5 minutes.'Frequently Asked Questions at Old Faithful. (2013). National Park Service. Retrieved from http://www.nps.gov/yell/planyourvisit/oldfaithfaq.htmGrayscaleForman Safety Negatives, Box 2