The ‘Buca del Tasso’ is situated in Metato, in the commune of Camaiore at 415 metres above sea level. It consists of a small cave that opens up on the left of the Carpigna torrent flowing into the Lombricese stream which, at the moment of the discovery, was completely obstructed. Archaeological investigations were carried out between 1914 and 1922, under the direction of the Committee for Human Paleontology Research of Florence. This research lead to the discovery of some stone tools and animal remains. Subsequent excavations lead to the finding of a human femur referable to Homo Neanderthalensis. Analyses on the archaeological material found have dated the activity around the cave back to the final phases of the Medium/Upper Palaeolithic Era, about 40,000 years from today.