 The landscape of the area is volcanic - hills interspersed with wooded gorges, deeply imbedded rivers, hot springs, ancient villages and towns on rocky tuff.About 6 km (3 mi) to the north of Capranica is the crater-lake Vico; at above sea level it is one of the highest major Italian lakes.South of the town, away is another crater lake, Bracciano, with a perimeter of about ; this was ancient Rome’s water supply and is still used for this purpose as one in a system.