Those who love all things nautical will enjoy Ponza Harbor. It's a nice place to go for a wander by the waterfront and admire the boats.
If you like the word "free" as much as most do, you'll be glad to know this place for ships to anchor is just that! Ponza Harbor is located in Ponza. To keep your travel schedule full while you're in these parts, also drop by Cala Feola Beach, Grotte di Pilato Caves and Chiaia di Luna beach.