Daniel Jouvance Espace Mer brings the benefits of thalassotherapie (healing with ocean water) to the city. This sleek, glass-encased complex blends the serious science of marine biology and dermatology with classic beauty treatments. Try the Aquaprima body treatment -- an hour and a half of exfoliation, hydromassage, massage and seaweed wrap for EUR110, or the Aquanova facial with shiatsu massage for EUR40. Métro: George V.