2Aconcagua, Argentina

At 6,959 meters (22,831 feet), Aconcagua is the highest peak in South America and one of the Seven Summits. Climbing Aconcagua is a grueling test of endurance, with long days of trekking at high altitude and harsh weather conditions that can include snowstorms and high winds. The physical demands of the climb are matched by the mental challenge of pushing through exhaustion and dealing with altitude sickness. A successful ascent of Aconcagua is a significant achievement for any mountaineer, offering stunning views of the Andes and a sense of accomplishment that few other experiences can match.