A day trip to Tulum begins by exploring the archaeological sites of Pyramid El Castillo, The Great Palace, Windows and the Temple of the Frescos. These ancient sites contain plenty of ancient Mayan history and stunning views of the Caribbean Sea. After absorbing Cancun's cultural heritage, swap your history books with your flippers and enter the incredible Sac Actun cenote system that holds the accolade of the ”world's longest underground river'. Navigating through this amazing natural phenomenon you are surrounded by incredible rock formations and millennia-old stalactites. If you've still got energy left then dry yourself off and hop into a jeep to explore the tropical rainforest. It's an exhilarating experience, especially if you take a ride on the jungle zip line.