Ojos del Salado was even higher than Ojos del Salado. Later measurements using more precise equipment showed that Ojos del Salado is about higher than Pissis. Furthermore, in 2007 a Chilean–Argentine–European expedition organized by Andes Magazine and Azimut 360 performed a survey on both Ojos del Salado and Monte Pissis using more accurate instruments. It found the former to be and the latter Although this fits within recent handheld GPS surveys, which have estimated the mountain to be between and , the vertical error margin of the expedition's equipment, , leaves uncertainty as to the mountain's more precise altitude. Ojos del Salado has
Áncash Region other smaller ones, a real symphony of summits with different grades of difficulty in climbing. This mountain range was called White, not only for its eternal snow but also for the chemical constitution of its quartz and feldspar rocks. It has the highest summit in Peru and the fifth one in America after Aconcagua, Ojos del Salado, Bonete and Mercedario: Huascarán, whose south peak reaches 6768 msnm. Huascarán's north peak reaches 6655 m. Allpamayu whose height has been estimated in 5,947 m, has been considered as "the most beautiful snow mountain of the world". This statement was achieved by the