The watery thermal dynamics of the most well-known geyser, Old Faithful, erupting at Yellowstone National Park in the winter and summer with the first scenes from the perspective of a captivated visitor followed by a time-lapsed look from Observation Point.
Old Faithful is one of nearly 500 geysers in Yellowstone and one of six that park rangers currently predict. It is uncommon to be able to predict geyser eruptions with regularity and Old Faithful has lived up to its name, only lengthening the time between eruptions by about 30 minutes in the last 30 years.
Thermal features change constantly and it is possible Old Faithful may stop erupting someday. Geysers and other thermal features are evidence of ongoing volcanic activity beneath the surface and change is part of this natural system.
Yellowstone preserves the natural geologic processes so that visitors may continue to enjoy this natural system.
