Dis, one of the Nine Hells, is both a realm and a burning city of iron known as the Iron City of Dis. The walls of the buildings of the city radiate extreme heat, as do the stones of the streets; more than brief skin contact results in severe burns. Although the Iron City of Dis has a wall, the transition from plain to the city itself is imperceptible. One moment a traveler is passing an iron spur, the next the traveler is in the middle of the city with the mighty iron walls surrounding everything that can be seen. It is thus much easier to enter the Iron City than it is to leave it; to leave, one must pass through the heavily guarded city gates (unless the traveler has means of crossing planes of existence).
