This 2100-sq-km national park contains one of the best primary rainforests in the country. It is famous for its vegetation, which includes rare hardwoods, bamboos, and dozens of species of fern, palm and orchid. Ten lemur species are found here, along with several tenrec and mongoose species, 14 bat species, 60 reptile species and about 85 bird species. It also encompasses three protected marine areas. The reserve is only accessible by boat, or on foot if you are hiking.