The Rosario and San Bernardo Corals National Natural Park (Spanish: Parque Nacional Natural Corales del Rosario y San Bernardo) is a natural park located in the Sucre and Bolívar Departments on the coast of the Caribbean Region of Colombia, 45 km from the Bay of Cartagena. It was the most visited national park in Colombia in 2009, with 318,473 visitors. Most of the park is underwater and it mainly protects marine ecosystems, including coral reefs living on depths ranging from one to 30 meters.