Mineral waters bubbling up from the earth's crust. Relaxing out under the starry night sky. There is nothing quite like your first experience. Do not trespass at private hot springs without the landowners permission.
Hot springs are a naturally occurring phenomena.
Neither improved nor maintained by the Forest Service. Footing around hot springs is often poor. Use cation when going barefoot and don't go alone. Water temperatures vary by site, ranging from warm to very hot. Test the water first for temperature to avoid scalds and burns.