The spindly, spiky limestone pinnacles of this national park are believed to be around 200 million years-old, and they are as impenetrable and inaccessible as their dramatic, jagged beauty suggests. Tsingy de Bemaraha, whose name means ‘the place where one cannot walk’, is a giant labyrinth of rock formations, lakes, mangroves, lakes and canyons, with just a few trails and rope bridges the only signs of human interference. It’s an important area for Madagascar’s wildlife, famous for its endemic reptiles and several species of endangered lemurs.