Island Spa has a bright, open and modern squeaky-clean layout in a 32,000-square-foot building. Spa-goers can stay overnight for an additional $10 to their $35 admission fee on Friday or Saturdays.

The average American's first visit to a Korean sauna may be intimidating. To most of us, the prospect of stripping naked to be scrubbed, soaked and massaged alongside strangers may seem, well, foreign ...