Isla del Sol is a Bolivian island in Lake Titicaca. It’s crossed by trails and known for Inca sites like Pilko Kaina, with its ruined palace. In nearby Yumani village, the Escalera del Inca is a staircase leading to a spring once believed to prolong youth. In the north, near Challapampa village, are the labyrinth-like Chincana ruins. The Roca Sagrada is a large rock said to be the birthplace of the first Incas.