Located south of Lake of Lugano, Mount San Giorgio, is very interesting from a historical, archaeological and scientific point of view. It is also crucial for paleontological research, with its rocks that contain a rich amount of fossils dating back 250 million years ago (Middle Triassic). During this period the stagnant seabedand low in oxygen in the lagoon created an environment conducive to the preservation of the remains of animals that lived there as reptiles, fish, ammonites and shellfish. Without forgetting the mainland numerous fossils of terrestrial species, like reptiles, plants and insects, and one specimen of skeleton of arcosauro, the Ticinosuchus and other rare species such as Sangiorgiosaurus or Ceresiosaurus, who take their name from the place of occurrence. The specimens found are to date about 21,000, the sediments of Mount San Giorgio are the best fossil record of marine life when this area was a tropical lagoon environment, sheltered and partially separated from the sea. The testimony is not unique to the marine species but also of terrestrial life. Very important it is the presence of five different fossil formations, telling the evolution of the climate and life over a period of about 15 million years. In the museums of Besano and Milan you can look and admire many of these findings who were subject of study in Switzerland and Italy for about seventy-five years.