GENERAL DESCRIPTION: The Canarreos Archipelago, whose high level of preservation and diversity of resources are its main potentials for tourism, lies along the southwestern coast of the island of Cuba. The gem of this group, which consists of around 300 keys, is Cayo Largo del Sur, a long, thin islet whose greatest width is 6,5 km. (four miles) across and whose narrowest point is just a little over half a mile wide. Everyone who has seen its 27 km. (nearly 17 miles) of beaches describes them as "heavenly". Prestigious specialized publications such as National Geographic have said that the seabed near Cayo Largo del Sur is one of the best preserved on earth – the truth of which can be confirmed by diving at any of the 33 scuba-diving sites near the key. Bird watching in its large mangrove swamps is also very rewarding.