Tsingy de Bemaraha National Park became a UNESCO World Heritage Site in 1927. The Tsingies are karstic formations created by acidic water eroding the surface of limestone cracks, the result vast underground drainage systems and dramatic limestone structures. In between these lies the Manobolo River, surrounded by riverine and mangrove swamps. there are a large number of endemic species throughout the park, including 11 species of lemur, six species of bird, 17 species of reptile including the world’s smallest chameleon and a species of rodent that is found nowhere else in Madagascar.