Pandaemonium (Final Fantasy II)

Pandemonium is the final dungeon of Final Fantasy II. While it is really part of Hell, it appears in the world after the Emperor is resurrected, replacing Palamecia castle. On the fourth and fifth floors are four treasure chests, each guarded by a powerful boss. These bosses are Zombie Borghen, Tiamat, Beelzebub, and Asteroth. At the top of Pandemonium Castle lies the Emperor himself, who is the final boss.

Pandemonium makes a reappearance in Final Fantasy IX.