Old Faithful Geyser is located in the Upper Geyser Basin of Yellowstone. Old Faithful erupts about every 75 minutes and has a duration of a few minutes.

Old Faithful Geyser:

Old Faithful movie (0.7 Mb, 29 sec)

Above image copyright 1999, Michael Frazier. All rights reserved.

Old Faithful Geyser from Observation Point:

Old Faithful Observation Point movie ( 1.5 Mb, 15 sec ).

Above image copyright 1989, Mark Knowlden. All rights reserved.