Ojos del Salado, which is located on the Chilean/Argentine border, has one substantial claim to fame. The highest active volcano in the world, it towers over the altiplano at a breath-taking 22,615 ft. (6,893m). It’s also the second highest mountain in the southern hemisphere, falling just short of nearby Aconcagua’s stately 22, 838 ft. (6,961m) above sea […]