Orcus-town, also known as the ghost town (and The Orcus Level in the source), is a special level somewhere between the 10th and 15th levels of Gehennom (and therefore between DL 35 and DL 44). It may contain the stairs to Vlad's Tower. Orcus-town is eligible to leave bones files. The entire level is no-teleport. All walls and the floor are diggable.