Occupying a great swathe from Ecuador to Argentina, the vast Altiplano is the largest high plateau outside Tibet. One of the world’s great rail journeys traverses the plateau from Cusco to Lake Titicaca which, at 4000m in altitude, is the world’s highest navigable lake. Titicaca is home to alpacas, llamas and the Uros and Aymara peoples with a long history predating the Incas by thousands of years. Many still live on floating reed islands and travel by reed boat. Day trips can be arranged by boat to the Uros and Taquile Islands, and for those looking to immerse themselves in the local culture, overnight stays with families on Amantani Island are also possible.