Madeira is the largest island and highest island, with an area of 741 km² (286 sq mi). The island extends east-west approximately 57 km (35 mi), and is 22 km (14 mi) at its widest point. A mountainous spine runs the length of the island, and Pico Ruivo, the highest peak, reaches 1,861 meters above sea level. Porto Santo Island, which lies 43 km northeast of Madeira. is the second-largest island with an area of 42.2 km² (16.28 sq mi).