Inhospitable: The Grand Tsingy may look uninhabitable, but there are thought to be 11 species of lemur, 100 types of bird and 45 kinds of reptile living there Perilous: An explorer climbs among the razor-sharp peaks of the stone forest, where the eroded limestone rocks extend for 230-square miles Intrepid: Climbers Luke Padgett and John Benson scale another dangerous-looking peak in the Grand Tsingy, thought to be the world's largest stone forest Forest of life: Various forms of greenery can be spotted within the Grand Tsingy stone forest, despite the apparently inhospitable environmental conditions It's like a cave without...