The ancient Oracle of Acheron is located in the village Mesopotamos of Preveza, at the point where the river Acheron esmige with Kokytos and Pyriflegethonta, on the northwestern shore of Lake Acherousian, which was entering the world of souls. It is built on top of a hill, which ended the visitors from the Cape of Cheimerio Beach village, to communicate with the souls of their loved ones. Homer's Odyssey describes the region during the descent of Odysseus into Hades.