Hell's Gate is located right in the middle of the twin-like towers, in the heart of Daten City. The gate requires the key of the blood kin of Hell's Monkey in order to be unlocked.
Background[]
In "D.C. Confidential", Corset inquired the gate had been sealed a long time ago, with the purpose of guarding The Other Gods.
In "Bitch Girls: 2 Bitch", Corset was able to open the gate, but was defeated by the Anarchy Sisters, whose mother squashed the ghost, along with Chuck, who zipped it closed.
In "Panty and Stocking: Homecoming", Corset was nearly able to get Hell's gate open due to the angelic and demonic forces clashing within Stocking's body, which released massive amounts of energy to the ground.
However, he failed, as Stocking became distracted and eventually turned back to normal during her fight with Panty.