AIRE Ancient Baths Tribeca fills a restored 1883 textile factory on Franklin Street with 16,000 square feet of candlelit thermal baths. Guests move at their own pace through pools at different temperatures, an ice-water plunge, an aromatic eucalyptus steam room and a skylit tepidarium with warm marble beds. The 90-minute Ultimate Bath costs $185, booking is required and private sessions are available; adults only. Open Monday to Thursday 10am to 10pm and Friday to Sunday 8am to 11pm.