Sau Reservoir (Catalan: Pantà de Sau) is a reservoir located on the Ter river, near Vilanova de Sau, Catalonia, Spain. The dam was completed in 1962, creating a reservoir with a storage capacity of 151.3 hm³ that covered the former town of Sant Romà de Sau. The Church of Sant Romà is still visible when the water level is low.
https://en.wikipedia.org/wiki/Sau_Reservoir