Kassel's hop-on-hop-off sightseeing bus loops around town 6 times daily, taking about 75 minutes to travel from Papinplatz (behind the Ottoneum museum) via Karlsaue, the Bergpark, Schloss Wilhelmshöhe and the KulturBahnhof back to the city centre. Some tours also include the Herkules viewpoint; this complete circuit lasts 2,5 hours. Day tickets can be purchased from the driver, the tourist office or the kiosk at Schloss Wilhelmshöhe, and are also valid for public transport in Kassel.