Located at the base of the 6893-metre Volcán Ojos del Salado, the mineral-rich Laguna Verde is renowned for its vividly coloured waters, which change from turquoise to emerald depending on the time of day. The best camping spot in the area is on the lake’s western shores, where a small structure houses a hot-spring bath that offers blissful relief from the area’s chilly high-altitude temperatures.