Great Jones Spa

Based on the theory that water brings health, this Noho mainstay is outfitted with a popular water lounge that boasts subterranean pools, saunas, steam rooms and a three-and-a-half-story waterfall. Enjoy the serenity of the 15,000-square-foot paradise while getting a haircut ($90 and up), or treat yourself to a Coconut Paradise Manicure ($40). Access to the water lounge is complimentary with services over $100, or a three-hour pass is available for $50.