While somebody tours Venice with his own it is easy to leave out a lot of important sites which couldn't be left out; this happens because this city has got an immense number of cultural and historic relevant building and places.

For this exact reason, although the adventure is always a bonus in all trips, it might better to get some tours in Venice with an official guide such as "A guide in Venice" which guides allow travellers to have a better logical connection with the city explaining its background and showing its most fascinating and hidden sides.