The Dark Circus is a dimension created by the BBC in 1988 for Doctor Who.
The Dark Circus is the Gods of Ragnarok's dimension. Which appears as an arena consisting of grey stone slabs that have inscriptions. Entrance to it is usually through a well on Segonax, though they can also create a bridge for others to enter the Circus. Gladiators are lured to the Dark Circus, where the Gods feed on the entertainment.