The Mexican Caribbean island of Cozumel is a frequent stop for cruise ships because of its excellent scuba diving. Divers can explore the underwater sculptures at the Museo Subacuático de Arte and the Mesoamerican Reef in Arrecifes de Cozumel National Park. There are dolphins, manatees, and sea turtles in the waters of Chankanaab, an environmental park that features a lagoon with underwater tunnels.