Cavallo Point Healing Arts Center & Spa at 601 Murray Circle, Sausalito, California.

The beautiful setting enhances your experience at this spa. If you buy one of the multiple treatments available, you get access to their single-sex steam room and whirlpool, both of which are clothing optional, as well as the co-ed (swim suit/trunks needed) 100 degree (!) "meditation pool." All spa products, hair dryers etc are provided. You can also relax in the lounge or in their outdoor area which has chairs, tables and fire pits. If you're hungry, you can order food from their restaurant or purchase a variety of juices from the spa juice bar. It's a wonderful place to spend a few hours or a day, so close to the city, while still giving you the feeling of being "away from it all.