Sian Ka'an Biosphere Reserve, a UNESCO World Heritage site, is a vast protected area encompassing tropical forests, mangroves, marshes, and a large marine section intersected by a barrier reef. The reserve is home to a wide variety of flora and fauna, including endangered species such as the Central American tapir, the jaguar, and the marine turtle. Visitors can enjoy ecotourism activities, birdwatching, and boat tours through the reserve.