Atlas Obscura
Der Lake Museum Village in Sainte-Marie-du-Lac-Nuisement, France
Der Lake (or Lac du Der-Chantecoq) is the largest artificial lake in metropolitan France in terms of surface area. Built in the early 1970s, it was designed to protect Paris from flooding by regulating the flow of the Marne River. But in its wake, three villages were engulfed by water. Today, visitors can explore the few vestiges of these towns that disappeared beneath the water at the Der Lake…