Prison of Time

The Prison of Time (時間の牢獄) is located on Mare Tranquillitatis, in the furthest depths of the Moon. Originally, it was a data storage area and sandbox, but after the Catastrophe, it has been transformed into the Genii's base and a twelve-floor raid dungeon. It has also expanded to include the Pilgrim's Citadel (巡礼者の城塞).

So far, a few locations within the Prison of Time have been named: Mount Kunlun (崑崙), the Corridor of Confusion (惑乱回廊), the Sacred Wine Palace (神酒宮殿), the Bamboo Field (竹の原), and the Rampart of Needle Tower (針の塔の城壁).

Mount Kunlun
Mount Kunlun is one of the floors in the Prison of Time. Krusty was transported here after Calamity Hurts went haywire, and this is where he encountered Bucaphi.

Trivia

 * Mount Kunlun is modeled after the mythological mountain of Kunlun, while Bucaphi holds the title of Queen Mother of the West, one of the highest deities who resides on the mountain.