The Volcano of Roccamonfina is an extinct volcano in Roccamonfina, Campania, southern Italy. It was active from some 650,000 to 50,000 years ago. It comprises an isolated large cone of some perimeter between the Monti Aurunci, the plain and valley of the Garigliano, the Monte Massico and the Monti Trebulani. The central caldera has a diameter of nearly . Volcanic activity is now replaced by minor seismic movements and by the presence of mineral waters. The mount is part of the Roccamonfina-Garigliano Mouth Regional Park, created in 1999.