The Ritz-Carlton New York, NoMad

The Ritz-Carlton Spa New York, NoMad is a 6,800-square-foot floor within the hotel on West 28th Street, steps from Manhattan's old flower market. The street outside has sold blooms since the 1890s; the spa inside deals in a quieter trade. Treatments run from body scrubs and wraps to facials, scalp treatments and couples massages, with a separate men's menu and separate lounges for men and women. A steam room sits off the main circuit. Appointments are required, and hours differ by day: weekdays open later than weekends, a detail worth checking before booking.

The fitness centre, one floor below on C2, runs around the clock and pairs Technogym equipment with Peloton bikes; access needs a key card and guests must be 18 or older. Between treatments, the surrounding NoMad streets offer their own kind of recovery — the National Museum of Mathematics and Madison Square Park are both a short walk away, and the Empire State Building is visible from several of the hotel's upper floors. Booking can be done directly by phone or online. It is a compact, purpose-built spa rather than a resort-scale one, sized to a Manhattan hotel rather than a countryside retreat, and its treatments are built around short, precise blocks of time rather than long afternoons.