Question: what are the 5 rivers of the underworld?
Answer: Geographically, the Underworld was considered to have been surrounded by five rivers: the Acheron (river of woe), the Cocytus (river of lamentation), the Phlegethon (river of fire), the Styx (river of unbreakable oath by which the gods took vows), and the Lethe (river of forgetfulness).