It is not easy to visit the many abandoned islands in the Venetian Lagoon, but it is possible. I’ve been to almost all of them.
The Venetian Lagoon is much more than just a watery area around the city of Venice. It is an integral part of Venice, its history and its origin.
This is an interactive map of most of the islands in the Venetian lagoon. Many islands are abandoned, or privately owned and inaccessible