Imagine a vast expanse of sand dunes contrasting with the surrounding green forest. The Bintan Sand Dunes (often called the Sand Dunes) are a unique and rare natural phenomenon. Naturally formed by geological processes over thousands of years, they offer a dramatic and highly Instagrammable view. The fine white sand forms dunes with a stunning texture, creating a mesmerizing silhouette, especially at sunrise or sunset. r. The dense foliage and interconnected roots of the trees naturally give rise to a thriving community of animals and plants. Witness the agile leaps of macaques and silver leaf monkeys, and colourful kingfishers as you sail across the mangrove jungle on the Mangrove Discovery Tour.