Cahuita National Park, situated 35 km south of the city of Limón, has the largest fringing reef on the Caribbean coast of Costa Rica. Its main outer reef, situated 1 km from the coast, arcs around the northern tip of Punta Cahuita, runs southeast about 5 km, and bends inshore towards Puerto Vargas.  Several small patch reefs occur in the lagoon. There is also a small, 500m long inner reef (100 m from the coast) in front of Puerto Vargas Beach and some carbonate hardgrounds occur to the south of the main reef.