Pristine mangrove forests remain at Las Cabezas de San Juan Nature Reserve. In a kayak, reach places that are accessible only by narrow canals — intricate passageways through areas rich in bird life. With the mangroves all around, learn about the life of this coastal vegetation and its important role in our planet’s ecology. In the evening, paddle into the magical glow of the Laguna Grande bioluminescent lagoon. One of the world’s natural wonders, it contains billions of extraordinary organisms that are part plant, part animal and so small as to be invisible to the naked eye. They give off a burst of light when disturbed by any movement — it’s like millions of tiny stars have fallen from the sky. After experiencing this rare phenomenon, return to shore and Yuquiyú.