This list of GPS Coordinates of most California hot springs, even devulges water temperatures and conveniently links to topo maps for the more adventurous types … GPS- California Hot Springs
Are you Hot or Not? Geothermal World Maps
Here’s some fascinating views of geothermal activity around the world. Water temperatures are identified by different colored dots (blue being cold and red and orange being hotter than you want to dip your toe in.
Basically, you want to wallow where the dots are green!
For more maps see: http://www.heatflow.und.edu/maplinks.html
Native Americans and Hot Springs
Native Americans have a long relationship with hot springs.There is evidence that many of the major hot springs in the Americas were visited and used by local native peoples. There are artifacts near some of these hot springs that support a history of human activity that extends back thousands of years. Native Americans revered hot springs as a sacred healing place.[1]The natural hot springs in Tonopah, Arizona are a prime example. The name “Tonopah” derives from the Western Apache name Tú Nohwá, meaning “Water For Us” or “Water For You”, Though there are no ruins or evidence of dwellings in the immediate vicinity of the hot springs, the prevalence of grain-grinding mortar holes, pottery shards, and other man-made objects in the area suggest that this site was frequented for many years by native peoples such as the Hohokam. The hundreds of very high quality arrowheads found near existing springs in Tonopah attest to its popularity as a hunting ground.Reference: wikipedia