Sometimes it's just impossible to skip certain places which are too famous, and Venice is one of time. It was actually build on a artificial island and famous for its many canal and gondola. Though it's crowded, I would say Venice still has its charm, and there are many alleys to explore without the crowd.

The island is walkable with no road vehicle in sight, except for water taxi. Venice is actually a fairly large area to explore, with a few smaller islands nearby.