Now thalassotherapy is branching out, with newer centers in Tunisia, Cyprus, Mexico and on cruise ships from the Holland America line. What to expect from a treatment? No mere hour-long massage, traditional thalassotherapy involves a four- to 10- day series of soaks, saunas and rubdowns. Many new mothers in France, especially, make a beeline to a thalassotherapy center postdelivery–eager for the waters’ slimming and –revitalizing potential. (Baby can come along.) To find a center go to thalatel.com, thalassofrance .com or francethalasso.com. If you can’t afford the airfare or the spa stay, Orlane (orlaneparis.com) makes a ?line of thalassotherapy products.