Acherontas estuary stems from the mountainous of Prefecture of Ioannina and after 64 km empties into the Ionian Sea and the Sandy Beach in particular. Along the river has created a large number of ecosystems that are home to various species of plants and animals. The mouth of the River are located in the Northwestern coastal area of the Prefecture of Preveza. The area of the mouth and Close of Acheron is one of the 18 natural areas that have been identified as the most important of the continent. Stands out for its particular physical characteristics, such as bays with ammothinikoys formations, the marshland and coastal ecosystems with steep rock formations covered with pine forests.