The Acheron (/ˈækərən/; Ancient Greek: Ἀχέρων Acheron or Ἀχερούσιος Acherousios; Greek: Αχέροντας Acherontas) is a river located in the Epirus region of northwest Greece. It is 52 km (32 mi) long, and its drainage area is 705 km2 (272 sq mi). Its source is near the village Zotiko, in the southwestern part of the Ioannina regional unit, and it flows into the Ionian Sea in Ammoudia, near Parga.