Nothing beats unwinding by the water while you're on vacation. Enjoy a picnic at Lake Martignano and then hang around for a peaceful sunset.
You'll have no end of sightseeing choices when in Province of Rome. Lake Martignano is a good place to begin here, but there are numerous other fine attractions to appreciate. Vallelunga Circuit, Italian Air Force Museum of Vigna di Valle, and Montegelato Falls are close to the body of water and and will cap off your day nicely.