Depart Merida this morning and head towards Muyil, stopping off for lunch in the village of Coba. Continue to the virtually unknown Muyil Archaeologic Site – this ancient Maya trading post is one of the oldest once-inhabited sites in the country, with a history stretching back to 350 BC. Explore the ruins with your leader who will explain what life here once looked like. Next, head to the banks of the Maya River and board a small boat to explore the canals and lagoons of the Sian Ka'an biosphere. One of the largest protected areas in Mexico, this UNESCO World Heritage site covers more than 400,000 hectares of land, lagoon and marine areas, including countless flora and fauna. You’ll be joined by guides from the local community who will help you get the most out of this experience. Admire the ruins on the riverbanks before disembarking in the waters of the ancient Mayan mangrove canals, where you’ll experience a natural ‘lazy river’ and float through the peaceful canals in a slow but steady current. After 45 minutes of floating, carry on to Tulum.