From Tower Falls travelers follow the road to Mammoth Hot Springs, site
of the Park administration buildings.
Along the sides of the hill, from which the natural springs well, are a
group of steps or terraces over which flow the steaming waters of hot
springs, laden with minerals. Each descending step has been tinted by
the algae (plant life), living in the hot water, in a thousand tones. So
vivid are these colors that they appear to vibrate and glow in the
sunlight. Some of the older springs have now dried up, but about twenty
are still active.