Castaño Overo, Cascada de

Cerro Tronador is a lofty, ice-clad extinct volcano straddling the Argentine-Chile border. The volcano has been inactive since the Pleistocene and as a result has been heavily influence by glacial erosion. Extending below each of its eight glaciers are deeply carved valleys, into which the melt streams from the glaciers fall. The Castaño Overo Glacier produces the largest and most impressive waterfall on the mountain where the glacier's meltwater plunges between 1000 and 1200 feet over the valley's headwall in anywhere from six to twelve parallel streams of water. Because the glacier ends immediately above the cliff forming the waterfall, avalanches are commonly seen fluming down with the waterfall.