The star attraction of the Cozumel Reefs National Park - or Parque Nacional Arrecifes de Cozumel - not to mention Jacques Cousteau's television show, which quite literally put Cozumel on the map - is Palancar Reef. Actually composed of 4 separate coral reefs, it is home to sea turtles, rays, nurse sharks, barracudas, moray eels, lobsters, crabs, and a keleidescope of colorful fish.
Boats leaving from Playa Palancar take snorkelers out to the shallowest parts of the reef, about 2 kilometers (1.2 miles) from shore. Scuba divers, however, have several world-famous spots to explore. The Palancar Caves are probably the most famous attraction, with huge brain corals and swim-through tunnels. Palancar Horseshoe is another massive formation of huge corals, some partially damaged in 2005 by Hurricane Wilma. Less experienced divers can visit Palancar Gardens, a shallower spot with mellow currents.