Hidden away at the heart of Saint Germain des Prés in the vaulted cellars of an 18th-century building, Spa 28 is a mysterious but highly sought-after address. Here, water has truly therapeutic properties and each treatment is preceded by a relaxation session in the swimming pool, which also benefits from a Jacuzzi, Turkish bath, jet showers and counter-flow swimming lane. At Spa 28, where the customer is king, you can choose how long your care session and massage lasts, whether it is gentle, draining, muscle-smoothing or energizing, and which flower essence you use: Tahitian flower, Red Berries or Orange Blossom. Because nature and well-being are inseparable here, the Corps Spa 28 by Origine treatment mingles flower extracts, active ingredients from thousand-year-old trees and essential oils. A breath of fresh air in Paris.