Palmaria Island
The biggest island of Liguria. It is situated opposite the town of Portovenere, where boats regularly run for the island.
The island is famous for its landscape and beautiful walking paths, and no less beautiful beaches.
If you have enough time for visiting the Cinque Terre, we would recommend you to visit this island together with the town of Portovenere itself at least for one day.
For more detailed information - visit the website of Portovenere.