Lake Yanahuin (or: Yanahuni, Yanahuani) is situated in the central Peruvian Andes in the Pasco Region at an altitude of ca. 4,900 m. The site made world headlines in 1971 when on March 18 a rock avalanche of 100,000 m³ fell from an outcrop of jointed limestone ca. 400 m above the lake, causing a wave of 30 m that destroyed the mining camp of Chungar on the shore and killed 200-600 miners.
