Ghosttown has many different types of doors for many different types of passer-troughs. One can only pass through the doors which are meant for one to to pass through.
Once an unknowing tourist from Europe (an old place where they should know about these things) passed through a door not meant for European tourists. The door didn't lead the tourist into the dark abandoned house, but to the large basement of a high rise apartment building instead. All the doors in this basement lead to the basement itself and as of yet, the tourist is still in that basement looking for the door which will lead his way out.