Lake Albano, also known as Lake of Castel Gandolfo, has a typical circular form of a volcanic lake and is the deepest volcanic lake in Italy (168 m). On its shores are important prehistoric archaeological remains, such as the Village of Macine, and Roman ruins with Doric nymphs and that of Bergantino, an integral part of the complex of the villa of Domitian. The marbles of this villa were used for the construction of the Cathedral of Orvieto. The bottom of the lake is rich in finds informing that, during the Roman period, 'naumachie' were held here, i.e. shows in the form of naval battles. On this lake the rowing races of the 1960 Rome Olympics were held.