Enghien-les-Bains is a commune in the northern suburbs of Paris, France. It is located 13.5km from the centre of Paris, in the département of Val-d'Oise.Enghien-les-Bains is famous as a spa resort and a well-to-do suburb of Paris, developed in the nineteenth century around the scenic lake of Enghien. A casino, the only one in the vicinity of Paris, is located on the shores of the lake.NameThe suffix les Bains was added to the name when the commune was incorporated in 1850, to distinguish this place from the Belgian city of Enghien, near Mons, and to acknowledge the thermal baths for which Enghien-les-Bains is famous.The name Enghien itself does refer to the Belgian city, which was a fief of the princes of Condé, a cadet branch of the French royal family, who inherited the duchy of Montmorency in 1633. In 1689 they were allowed by King Louis XIV to rename the duchy of Montmorency to be the "duchy of Enghien", in order to revive the title, duc d'Enghien, which they had lost in 1569 at the death of Louis I de Bourbon, prince de Condé, who had not legally registered the title.