In Norte Grande the mountains form a series of plateaus, such as Puna de Atacama and the Altiplano. At a south latitude of 27 degrees, Chile's highest mountain (Ojos del Salado) reaches a height of . Below 42 degrees south, the Andes split into a fjord landscape and the highest mountain is Monte San Valentin at at north of Northern Patagonian Ice Field. As the mountains ebb, the snow line lowers; in the Llanquihue it is at , and in the Magallanes.