Regular guided two-hour tours of the old town, starting from the cathedral belltower, are organised daily by the Vilnius Tourist Office (tel: (5) 262 9660; website: www.vilnius-tourism.lt) from 15 May to 15 September. The tourist office can also organise prebooked guided tours and offers audio guides that people can rent and listen to on their own as they walk along the streets of Vilnius. In addition, there are quite a few thematic tours - such as ‘Medieval Vilnius', the ‘Panoramas of Vilnius', the ‘Secrets of the Courtyards'. Check the tourist office website or enquire at the tourist office. Vilnius City Tour, Ausros Vartu 7 (tel: (5) 261 5558; website: www.vilniuscitytour.com) organises two-and-a-half-hour bus tours around the city and runs bus tours out to Gruto Parkas and to the nearby historic town of Trakai.