The exclusive Palazzo Montemartini SPA draws inspiration for its wellness treatments from the nearby ancient Baths of Diocletian. The concept of the water pervades the entire structure, from the suites and the restaurant to the two hydrotherapy pools in the wellness center with their different temperatures. The SPA, which measures 600 square meters benefits from natural light and is equipped with a variety of treatment rooms, a heated indoor pool, jacuzzi with bubble beds, cervical waterfalls, tide pool, and chromotherapy sensory showers. Other facilities include a rejuvenating Finnish shower, sauna, Turkish bath, salt room, and a relaxation area with herbal teas. The SPA is open to both hotel and external guests.