Otherworld

Otherworld is a mystical realm in another dimension, which somehow occupies the same space-but on a different level of reality-as Great Britain does throughout the multiverse, and provides a link between all the various permutations of Britain in different universes. It is the current location of Camelot, the home of King Arthur, and is also where the Starlight Citadel, home of the Ominiversal Guardian Roma, is situated, as well as the temple of the Green Knight, patron of the Knights of Pendragon. Notable residents include the aforementioned Roma, her father Merlyn, Vortigen and the Proud Walkers, a race of Elves which included Moondog and Jackdaw, and (formerly) Captain Britain (Brian Braddock). Otherworld appears to be connected in some way to the Underworld ruled by Mandrac the Nether-God, and has long been under threat of invasion by the demonic Necromon and his servant Mordred. Others who have visited it include the heroic X-Men and Excalibur.