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Bosque Sumergido. In 1975 a violent earthquake caused half a mountain and its forest of cypress trees to slide to the bottom of the lake, creating the Bosque Sumergido. You can dive to 30 meters (98 feet) in crystalline water and explore this sunken forest. Boat trips can be arranged at Cabañas Aiken (P2944/479–048 wwww.aiken.com.ar). Villa Traful, Neuquén, 8403.