there is no particuar activity to do.....just go to the beach or better the rocks and take a sunbath or swim in a great clear water..anyway you can also do very beach and sea activity..like winsurf,snorkeling,swimmin',fishing....
Today this Castle is an important center for conferences and meetings, shows etc. On the first floor is located the new cultural circle called Armunia that takes care about these events.
Castiglioncello has many km of coast and beaches. In this pic you can see a typical view of this tiny village. There is also a little harbor where many tourist come with their boats.