I just got back from a festival hosted at the Harbin Hot Springs in Middletown, California.
For folks who have never heard of it, it's a new age community who maintains a natural hot springs and retreat center. There are a few hundred folks who live there, a mix of healers, artists and various spiritualities. They offer classes and events of their own, as well as providing space for other groups to host events. There is a hotel as well as camping available and they have a fantastic resturant with organic, vegetarian cooking.
You can learn more about Harbin Hot Springs
at their web site.