Venice is built on 117 small islands and has some 150 canals and 409 bridges (only three of which cross the Grand Canal). The historic centre is divided into six sestieri (quarters): San Marco, Dorsoduro, San Polo, Santa Croce, Cannaregio and Castello. It covers a deceptively small area - if you don't get lost (which you will!), walking from Cannaregio in the northwest to Dorsoduro in the south should take only 30 minutes. The city's 'main street' is the Grand Canal, which passes each of the districts as it twists along the length of Venice from the railway station to San Marco. The day we went there it was raining. The whole evening it was raining and we checked into the youth hostel and were going around. It was great traveling from one island to another by boat, the point worth mentioning is the getting lost in the islands. You can find your way back with the help of the map provided. We went around in the night trying to discover an Indian restaurant and had nice fun getting lost there in the city.