Hades Caverns

Origin
Hades, or the Hellenistic Underworld, is believed to be two things: A place where the dead of Greece and Rome reside... and a prison for those who have offended the gods. Several heroes, most famously Heracles and Orpheus, have travelled down to the Underworld on their quests.

Effects
The caverns occupy a far larger space than modern scanning equipment could detect, stretching far wider and far deeper than can be assumed.

History
While the Underworld has existed since Mycenian Greece at the earliest, the last known encounter with the area produced the Waters of the Underworld artifacts from the five rivers that flow through it.

Features

 * Surface entrance and the Archeron
 * Erebus and River Styx
 * The Three Judges and Cerberos
 * Asphodel and Lethe
 * Elysium
 * Tartarus Prison and River Cocytus. The main security for the prison is the River Cocytus. Most prisoners, much like the jarred water, will be unable to fully cross, so consumed by guilt.
 * Fields of Punishment and River Phlegethon-maximum Security for those who offended the Olympians, such as Tantalus and Sisyphus
 * Palace of Hades (Archeron can also go here)