Cottonwood Hot Springs Inn & Spa

Buena Vista's low-key option: natural artesian water in soaking tubs, a river plunge and a dry sauna, open 8 AM to midnight every day. No reservation needed for a soak, so you can simply turn up. A soaking pass is $45 and towels cost extra, so bring your own. Stay in a lodge room or cabin and the soaking comes with the bed, which is the easy way to get a late-night soak with a short walk home afterwards.