THE PEAKS IN THE AUSANGATE MOUNTAIN region of the Peruvian Andes are all uncommonly colored: Some are terra cotta, some lavender, others are a vibrant turquoise. They’re colored by the sediment and atmosphere of the area, unique because of its altitude and isolation close to the ocean. But none are quite so marvelous as Vinicunca, also known as Rainbow Mountain, Winikunka, Montaña de Colores, and Montaña de Siete Colores.