Agnano, a lake between Naples and Poz-zuoli, about 60 feet deep. The waters are strongly impregnated with mineral matter, and the lake is probably the crater of an extinct volcano. Tradition says there was formerly a town here, which was destroyed by an earthquake; and some antiquaries conjecture that it was the fish pond of Lucullus, who had a villa in the neighborhood. Mosaics and ruins of baths are found. On the shores of the lake are natural sulphur baths (Stufe di San Ger-mano), useful in gout, rheumatism, etc.; and 100 paces from there is the celebrated Grotta del Cane. (See Grotto.)