thousand years. High resolution dating and excellent 3-D exposure of the laccolith and its vertical feeding system allow detailed reconstruction of the Torres del Paine fossil magma chamber history. Hiking The Torres del Paine National Park—an area of —was declared a Biosphere Reserve by the UNESCO in 1978 and receives about 250,000 visitors annually. Trails and some campsites are maintained by Chile's National Forest Corporation, and mountain huts provide shelter and basic services. See also Fitz Roy Los Glaciares National Park References Biggar, John, 2015. The Andes: A Guide for Climbers (4th edition, ). Kearney, Alan, 1993. Mountaineering in Patagonia. Seattle USA: Cloudcap. External links Complete description of Torres del Paine in Andeshandbook x666AFSFASDDFFA Patagonia Webcam and maps from Paine Torres del Paine on summitpost Torres del Paine Circuit Planning Photograph of the cordillera from Estero Última Esperanza, 50 km to the south Mountain ranges of Chile Última Esperanza Province Landforms of Magallanes Region Miocene magmatism Torres del Paine National Park