Limbo is the first circle of Gehenna proper. Limbo is on the outer boundary of Hell, just across the river Acheron. Here lie those who were not sinful, but did not acquire the proper portal of faith. The River Acheron is the first of three infernal rivers in Hell. The others being the Styx and the Phlegethon. All three eventually descend through all of Hell and pool into the Ninth Circle, where they freeze and form Lake Cocytus. A dreary fog hangs over the water, and lightning strikes light up the sky above it.
