In the locality of “La Marmotta” of Anguillara Sabazia a Neolithic village was discovered dating back to about 8,000 years ago. It is now submerged by the waters of the lake. During the underwater excavations, important finds were recovered, including five pirogues (canoe) in particular. One of them is visible at the National Museum of Prehistoric Ethnography Luigi Pigorini.
Another one, 9.50 meters long and originally split into two parts, found on 12 July 2005 at a depth of 12 meters, is now kept in a 12-meter shrine containing substances that require stabilisation at the Neolithic Exhibition Centre in Anguillara Sabazia, located near the train station, in via Anguillarese.