My wife was born in Wegburg in 1964. We went there last November to have a look as she had never been back since then. It is all closed off, you cannot get too close. If you find the cafe by the lake you will then find a path up to the hospital about a 1/4 of a mile away. Drive up there and park at the fence with the guard house still there. Climb through and I reckon that the hospital is about 500 yards further up the road. It was derelict when we went and is probably gone now. Bit of a shame as it was the local mental health hospital until about 5 years ago.