The Schloss (castle) of the Schlossberg was more or less destroyed by Napoleon and the whole hill and remains have been transformed into wonderful parkland with excellent views.  We left Graz around lunchtime and travelled North to Wien.  The beautiful sunshine gaveway to thick fog, making driving more difficult.  The Autobahn in the opposite direction just south of Wien was closed as a result of a rather nasty accident.  We hit Vienna town centre before expected and so we hadn’t stopped to find or buy a map.  Nowhere was open so we headed through until we found a filling station, bought a map and then easily located the campsite that is open all year round.