Lake Titicaca, straddling the border of Peru and Bolivia, is the largest lake in South America and is considered the highest navigable lake in the world. Popular activities include visiting the Uros Floating Islands, Taquile Island, and Isla del Sol. Accessibility can be challenging due to the high altitude, so acclimatization is recommended. Tours are widely available and often preferred, especially for first-time visitors, though exploring independently is possible via public boats. The best time to visit is during the dry season (May to September) for clearer skies and calmer waters; the rainy season (December to February) can bring disruptions. Costs vary widely based on tour type and accommodation, but budget around $30-$100 per day. A typical visit lasts 2-4 days to experience multiple islands and aspects of the lake culture.