Cabo Pulmo is home to a 7000 hectare marine reserve which includes a rare 20,000 year old reef, one of only three in North America. It was granted UNESCO World Heritage Site status in 2008. The reef, once overfished and in decline is now considered one of the most important marine conservation successes in the world. This is largely attributed to the local population of 120 people who lobbied to protect the reef in order to secure a future for future generations. In fourteen years life in the ecosystem increased over 400% and has one of the largest concentrations of marine mammals in the world. A must visit for divers the area is rich with whales, sea turtles, and giant mantas.