14 Best Spas in New York City, According to Our Wellness-Obsessed Editors | Condé Nast Traveler

"A true hidden gem in the middle of downtown New York, AIRE Ancient Baths is tucked away in a former textile factory on an unassuming corner of Tribeca’s Franklin Street, but through its doors awaits the ultimate opportunity to unwind. Soaring ceilings and brick walls usher visitors through the lobby and down into a cavernous, candlelit, subterranean oasis of thermal baths, saltwater pools, and relaxation rooms. Each of the six thermal baths boasts a different temperature, be it hot, cold, warm, or ice, so spa-goers of every preference and variety can bathe as the Romans, Greeks, and Ottomans did centuries earlier. And while spending time dipping from pool to pool is retreat enough for many, guests can also choose from a number of treatments and rituals, like an ancient argan massage, a Himalayan salt scrub, a warm amethyst crystal massage, or an antioxidant-rich wine bath." - CNT Editors