The island of Sant’Erasmo in the Venetian lagoon is mostly agricultural. It was originally a lido, facing the sea, with the name Lio Marcense or Litus Mercedis.
This is an interactive map of most of the islands in the Venetian lagoon. Many islands are abandoned, or privately owned and inaccessible
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.