Yes and than there is Anguillara Sabazia,
An ancient, medieval small village, located on the clean waters of lake Bracciano, idyllic, authentic only 30km from the city of Rome.
Since I wouldn´t repeat what´s written already on Wikipedia. What could be more interesting for you, is that Anguillara is directly connected to Rome, by train and bus.
Windsurf, kitesurf, canoeing ….. or just laying belly-up on the beach are popular sports.
Beautiful beaches on the Tyrrhenian coast are 45 minutes away. The historical city of Viterbo with his Thermal Baths of the Popes with SPA (Terme di Papi), is at a similar distance.
Enjoy the taste of real Italian food …. the fish-restaurants I can really advice you.

and than there is a lot more beauty to see in the north Hinterland of Rome.