In the collective imagination, the historical city of Venice is seen as one great "architectural barrier". Almost 70% of the historic city centre is, in fact, accessible to people with impaired mobility.
Some of the richest in monuments and most enchanted sites in the city can be reached by public transport.
In fact if you look at the map, the green areas can be reached by the vaporetto and Giracittà motorboats. Only the white areas can't be reached by public transport but as a possible alternative, you can ask for a special transport service or rent a motorboat.