Located in western Madagascar, Tsingy de Bemaraha Strict Nature Reserve is a UNESCO World Heritage Site and the largest protected area in the country. Opened to the public in 1998, it contains spectacular limestone karst formations known as tsingy. The best way to get there is by small aircraft from the capital, Antananarivo. The 375,440-acre/152,000-hectare park is famous for its undisturbed forests, lakes and mangrove swamps. It is also a habitat for rare birds and wildlife, such as the Decken's sifaka, a kind of lemur.