The Necromanteion (Oracle of the Dead) sits on the low hill of Ephyra, about a fifteen-minute drive inland from Ammoudia. The site, used from the Hellenistic period into Roman times, was where the living came to consult the dead — after fasting, drinking hallucinogenic concoctions, and being led blindfolded through narrow corridors before descending into an underground vault.
The stone foundations of the labyrinthine entrance corridors and the barrel-vaulted underground chamber survive. Entry is cheap and there are usually only a handful of visitors; the small site does not need more than an hour. Combine it with the Acheron boat trip for a half-day from Ammoudia.