 Orciano's area, up to Volterra, is rich of findings of fossils from marine vertebrates, such as whales, sharks and seals, such as the "Pliophoca etrusca" discovered in 1875 by Roberto Lawley.Remains of a blue whale living 4 millions year ago, found here, are now in the Museum of Natural History of the University of Florence.Other Cetacean fossils from Orciano Pisano are held by Museo di storia naturale e del territorio dell'Università di Pisa.