Lago Colico is a remarkable freshwater lake nestled in the Araucanía Region of southern Chile, situated within the commune of Cunco in the province of Cautín, approximately 20 kilometers south of the city of Cunco and 75 kilometers from Temuco. Resting at an elevation of roughly 473 meters above sea level, the lake stretches approximately 19 kilometers in length and up to 5 kilometers in width, covering a surface area of nearly 55 square kilometers. What truly sets Lago Colico apart is its extraordinary depth — reaching a maximum of approximately 374 meters and averaging around 173 meters — making it the deepest lake located entirely within Chilean borders and the deepest non-cryptodepression in the country. The lake is fed primarily by the Trafampulli River, which enters from the west, and its waters drain outward through the Colico River. The surrounding landscape is a stunning mosaic of temperate rainforest, volcanic soils, and rolling Andean foothills, with native vegetation including coigüe, oak, Chilean firebush, hummingbird fuchsia, and quila bamboo framing the shoreline. The waters are notably transparent and clear, offering excellent visibility. The lake sits within a volcanically active zone, and the broader Araucanía Andina region holds deep cultural significance for the indigenous Mapuche people, who have maintained ancestral connections to this land for generations.