There are guided bus tours (tel: (031) 609 670; website: www.borjessons.com) daily from June to August. Departing from Storan at Kungsparken they cover most of Gothenburg's places of interest. The classic Gothenburg tour with the Paddan boats takes around 50 minutes and starts from Kungsportsplatsen and runs along the old moat and the canals from the 17th century before heading out into the harbour, whereupon it returns to the canals, passing under the ‘Cheese Slicer' bridge, so called because it is extremely low.To book guided tours for groups, contact Gothenburg Tourist Office (tel: (031) 612 500; website: www.goteborg.com).