The Spa at Four Seasons Hotel Denver

The Spa at Four Seasons Hotel Denver sits inside the hotel on 14th Street in the Central Business District and runs as a full-service day spa rather than a guests-only amenity. A $150 day pass gets access to the locker areas, showers, whirlpool, steam room, relaxation lounge, heated outdoor pool and fitness centre, with mountain and skyline views from the pool terrace factored into the pitch.

Treatment menu runs to eight offerings, including the signature Ultimate Detox Poultice Massage — a full-body massage with a charcoal, lemongrass and coconut scrub, warm herbal poultices, and a cooling facial finish meant to aid lymphatic flow. There's also a cold-therapy facial, a luxury manicure with hot stone hand massage, body scrubs and wraps, and Emsculpt body-contouring sessions. Two couples' suites are available for shared treatments, and a seasonal spa-day package bundles water therapies with three treatments at a discount.

Access has age rules worth knowing before booking. Guests 12 and under cannot use the spa facilities at all. Those 12 to 15 need a parent or guardian present for treatments and a signed waiver; 16- and 17-year-olds need only the waiver. Not every treatment is open to under-18s, so it's worth confirming specific services at booking.

Hours shift by day: weekdays run 10am to 6pm, while Friday through Sunday the spa opens earlier, at 9am, and stays open until 8pm. The combination of pool, fitness centre and treatment rooms under one roof makes this more of a half-day or full-day visit than a quick add-on.