For a place considered a desert we’ve got no shortage of visible water. 

many of the falls we see in the area are remnants of the Bonneville Flood

A few years ago I was on a riverboat tour along the Snake River.  The guide explained many of the falls we see in the area are remnants of the Bonneville Flood.  It scoured the landscape and exposed many underground springs.

Those springs are above ground and now flow downward.  The more visible falls along the river have simply been carved by years of erosion.

Only in Your State periodically features Twin Falls and the surrounding area.  In one post earlier this year it focused on the falling water in the Magic Valley.  You can see the story by clicking here.