Bracciano is built on a hill above the clear water of Lake Bracciano, a volcanic lake where it is possible to canoe, scuba-dive, sail and much more (especially during hot summertime days, when a dip in the lake can be most refreshing). Lake Bracciano is actually an important hub for several sports, given the presence of the Bracciano-Martignano Natural Park, that puts a prime on silence and water quality by limiting the number of motorized watercraft.
The Park, of course, comprises another lake, that of Martignano; also boasting volcanic origins, it is characterized by its small size and almost perfectly-circular form.
The two lakes are really two peas in a pod: born from the same volcano (but from two different craters), each is highly-protected and welcomes a large number of tourists every year. --
