The most beautiful and suggestive way to visit Venice is surely to walk around its streets. Getting lost in the calli of the lagoon to come out near a bridge or a particularly beautiful glimpse is the best way for tourists to discover the city. Venice is not very large and the places of interest are all within walking distance.
On high tide days, the city can still be visited thanks to the walkways located on the main routes and from which you can observe an even more characteristic Venice.
LINKS:
Move around Venice with Vaporetto
Moving around Venice with Gondola Ferry
Moving around Venice with Water Taxis
Move around Venice with Alilaguna