This article concerns the Greek river. For other uses, see Acheron . | basin_countries = Greece | length = 58 km | elevation = | discharge = | watershed =}}The Acheron () is a river located in the Epirus region of northwest Greece. It flows into the Ionian Sea in Ammoudia, near Parga.In mythologyIn ancient Greek mythology, Acheron was known as the river of pain, and was one of the five rivers of the Greek underworld. In the Homeric poems the Acheron was described as a river of Hades, i