Acheron river (lat. Styx) is located in the Epirus region in northwest Greece. The river is 52 km long and it flows to the Ionian Sea in Ammoudia, near Parga. 

The first springs of the river are up on the mountains near Ioannina, but the biggest spring area is located in Glyki, Thesprotias.

In Glyki, the spring area is protected by EU’s Natura 2000 – program.