ancient Circaeum Promontorium.
Mountain, southwestern coast of Italy.
The promontory, on the Tyrrhenian Sea , rises 1,775 ft (541 m), and is connected with the mainland by a low saddle. About 33 sq mi (86 sq km) are preserved as a national park. From the sea it resembles an island, and it has been associated with the legend of Circe since classical times. Its coastal grottoes have yielded traces of Stone Age settlement, and there are remains of a Roman acropolis.