Excursions Zannone
The small island Zannone is the only one of the islands of the Pontian Archipelago not of volcanic origin with very ancient metamorphic rocks. Since 1979 it has been annexed to the Circeo National Park.
From the islet of Gavi to the extreme north of Ponza, the route leads straight to the Varo, the only place suitable for landing on Zannone when the sea is calm, near the Peschiera from the Roman era