Argentta Spa

Argentta Spa occupies the Watergate Hotel in Northwest D.C., and its main draw for a day visit is the original heated indoor pool, a wet area retaining the building's retro character. Along with the pool, guests can use a whirlpool, dry sauna and hammam-style steam room. A 24-hour fitness center with cardio machines, stationary bikes and free weights rounds out the facilities, run in partnership with Verve Health & Fitness, which also offers personal training and fitness classes.

Treatments are the other half of the experience, covering massages and facials, though specific menu pricing isn't listed here. The spa operates on a day-pass basis, open to adults, so it's accessible whether or not you're staying at the hotel. Treatment hours differ from general pool/spa access: treatments run Monday and Thursday from 11am to 6pm, and Friday through Sunday from 10am to 6pm, with the spa closed Tuesday and Wednesday for treatments. The pool and spa amenities themselves are open daily from 6am to 9pm, and the fitness center never closes.

This is a mid-to-upper price tier spa (tier 3), fitting its setting inside a well-known hotel. Visitor accounts mention a relaxed, unhurried atmosphere, a comfortable waiting area, and small touches like champagne and macaroons after treatments. For anyone in the area rather than staying overnight, it works as a standalone day-spa stop, not just a hotel perk.