Gates of hell unearthed by Italian archaeologists is said to be the entry gate to the Underworld; it is linked to the Greco-Roman mythology and tradition. Rivers Cocytus, Lethe, Phlegethon and Styx were also entrances to the Underworld. The god Hades kidnapped the goddess Persephone from a field in Sicily and led her to the Underworld through a cleft in the earth so he could marry her. Into the medieval period, Mount Etna on Sicily was considered to be an entryway to hell. The gates of hell were commonly depicted as jaws, forming the Hellmouth, which was simultaneously the entrance to hell and
Pluto (Marvel Comics) major enemy of Hercules, when the young Hercules captures Pluto's dog Cerberus as one of his Twelve Labours. When worship of the Greek Gods dies out, Zeus forbids Pluto to take anymore souls into his underworld. He became bitter and begins a long history of plotting against his more powerful brother. After numerous failures, Zeus decrees that Pluto can only leave the Underworld if he finds someone willing to rule in his place. Pluto travels to Earth and disguises himself as Mr. Hellman, a movie producer, and invites Hercules to make a movie about himself. Hercules signs the contract into