Check out a video HERE of Carr crossing one if the chasms.
Fascinating and ultra-cool looking limestone rock formations (jagged pinnacles, deadly sharp spires, caves), fossils, rope bridges over dizzying drops and relatively protected wildlife (we saw several species of lemur jumping happily and grunting in groups) are among its many wild wonders. A number of trails are possible, but you must hire a guide due to the dangerousness of the trail (for example, some sections require climbing with a harness and many of the caves and cliffs require you to be relatively limber and fit) and to locate and protect the wildlife. We enjoyed it thoroughly and it was definitely the highlight of Madagascar for us. We spent a couple of nights at an overpriced and forgettable lodge named L'Olympe, and then hit the road back to Morondava.