The 85 mile stretch, known as the Riviera Maya is situated along the coastline of the Yucatan Peninsula in the state of Quintana Roo, Mexico. The Riviera Maya begins 10 miles south of Cancun International Airport in Puerto Morelos and ends at Felipe Carrillo Puerto, a small town located between near Mayan communities and the Sian Ka'an Biosphere Reserve. The largest towns are Playa del Carmen, Puerto Aventuras, Akumal and Tulum. Hotels and resorts offer something for every lifestyle and budget. Accommodations range from small, quiet inns to full-service all-inclusive resorts. There are over 300 hotels in the Riviera Maya. Archeological Mayan sites can be found throughout the Riviera Maya in Tulum, Cobá, Xcaret, Playacar, Xel-Há and Muyil with the sites in Tulum and Cobá the most important and complete. The Great Maya Reef is the second largest reef system in the world and offers many options for diving and snorkeling. Along the coastline divers can find cenotes, sink holes created when pieces of land above the subterranean rivers collapsed millions of years ago. Filled with clear, tranquil water the cenotes were considered sacred by the Mayans. The entrance and exit of the Riviera Maya’s underground rivers often lead to caverns, an underwater world filled with stalactites and stalagmites and waters with no current and great visibility.