There is a hole in the world (well, a hole in the invisible wall) near Chattam that you can escape into the wilderness to If you leave the railway and cross the road and go between these two buildings you can escape. This isn't causing any problems but I imagine its not intentional. Paul
Somewhat interesting -- now, if only I could remember which route includes Chatham -- or "Chattam", as you spelled it, but I'm quite sure it's Chatham. Anyway, a few more screenshots along the escape route would be interesting.
LastTrainToClarksville the answer from stevenwalker1985 is correct, this is SEHS. From my photo it would not be hard to find based on the map but if you struggle then check between the two stations
Thanks for the replies; that's a route I don't own and am not likely to buy, since passenger runs just don't interest me very much.