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 man-made and natural lakes connected by canals built by the French just inland from the east coast and running parallel to it for some .