As the largest protected area in the Mayan Riviera and esteemed UNESCO World Heritage Site, Sian Ka’an has been the region’s premier nature and outdoor recreation destination since it opened 20 years ago. With nearly one-third of Mexico’s Caribbean coast dominated by the park, there is also no shortage of nature to explore. Located just south of Cancun near the ancient city of Tulum, Sian Ka’an offers some of the best daytrip opportunities for tourists staying in Cancun.