The Spa at Mandarin Oriental, Boston

The Spa at Mandarin Oriental, Boston sits inside the hotel on Boylston Street and functions as a full-service treatment and thermal facility rather than a quick drop-in gym add-on. The space includes a Crystal Steam Room built around a quartz centerpiece, a heated Vitality Pool with hydrotherapy jets, a relaxation lounge with tea and light snacks, and a fitness center. Access is restricted to adults 18 and older, and couples treatments are a core offering alongside individual services.

The signature booking is the Mandarin Suite, a private room with its own soaking tub and cedar sauna. It runs two hours and fifty minutes and is priced at $1,630 Monday through Thursday, rising to $1,750 on weekends. A second couples option, Sanctuary of Serenity, offers side-by-side treatments at 1 hour 50 minutes ($980–$1,040) or 1 hour 20 minutes ($700–$760), again with weekday and weekend pricing.

Thermal facilities - the steam room, pool, and lounge - are only accessible before a booked treatment, so the spa recommends arriving 30 to 45 minutes early to use them; they are not set up as a standalone soak. Both walk-ins and day passes are listed as available, though the spa is otherwise described as hotel-guests-only, so confirming current policy by phone is worth doing before planning a visit. A 20% gratuity is added automatically, and cancellations inside 48 hours are charged in full.

Hours run 9am to 7pm Monday through Wednesday and 9am to 8pm Thursday through Sunday. The spa can be reached at (617) 535-8820 or by email for booking.