The second prison: the foot of the underworld, the main city of Phantom City (Shuicheng), including Aiken Snow Mountain (Snow Moon Forest) and Optimus Prime.
The third prison: the hand of the underworld, the main city of Kerria, the ore trading base, rich in gold mines and black pearls.
The fourth prison: the tooth of the underworld, the main city of Smir (Leicheng).
The fifth prison: the face of the underworld, the main city Yula tribe (devil tribe), including the eagle waterfall and the tree called the eye of the underworld.
The sixth prison: the brain of the underworld. The main city of Lyme City (Fire City) includes the Dragon Wrath Valley, the windmill, the Manzhu Shahua, the Wanmo Hall, the Satan Flame Building, Solomon and the 72-pillar fiend.
The seventh prison: the underworld? The main city of Rodoga (the capital of darkness), including the ghost land Pandimanan, Optimus Prime, Bone Hall, Rodoga Arena, Rodoga Opera House and Rodoga Library.
The eighth prison: the hair of the underworld, the main city of Shabei town, the former Jin Ge Cang Yuan, and now the hanging garden.
The ninth prison: the soul of the underworld.
(Usually, the main city of the underworld is in the center of the ring, and the first prison area to the seventh prison area have their own nicknames, named after the body parts of the Great Devil. )