 The filming of this anomaly comes to be referred to as "The Five and a Half Minute Hallway".This hallway leads to a maze-like complex, starting with a large room (the "Anteroom"), which in turn leads to a truly enormous space (the "Great Hall"), a room primarily distinguished by an enormous spiral staircase which appears, when viewed from the landing, to spiral down without end.There is also a multitude of corridors and rooms leading off from each passage.