At first 1 thing about this place on station Markkleeberg-Gaschwitz... There is almost no invisible walls. There is a wall just in the right of this bridge but you just can walk around it and you will be behind it. Also this bridge is not physical if you do not go along railroad you will just fall under it. Next is this on the same station... At this point if you go towards this fence you will be under whole map like this...(that is a luck what I fell on a wall near to this spot) So like this and that's to infinite fall)