Madagascar's highest peaks rise from three prominent highland massifs: Maromokotro  in the Tsaratanana Massif is the island's highest point, followed by Boby Peak  in the Andringitra Massif, and Tsiafajavona  in the Ankaratra Massif. To the east, the ''Canal des Pangalanes'' is a chain of human-made and natural lakes connected by canals built by the French just inland from the east coast and running parallel to it for some .