south america nature landscape, dark canyon after post-eruptive lahar on mountainside through araucaria araucana forest of villarr

america andes araucana araucania araucaria ash black canyon chile chilean dark debris destructive dramatic environment evergreen flow forest hiking huacho lahar landscape material monkey mountain mountainside national nature outdoor park patagonia piconero pine pino posteruptive pucon puzzle pyroclastic ravine river rock rocky scenery sendero south stone stratovolcano tail trail traverse tree trekking valley view villarrica volcanic volcano zanjon