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Bergfürerbüro. This mountain-climbing company conducts daily guided forays throughout the year and rents season-appropriate equipment. A popular activity is gorge crossing, which uses safety cables and pulleys to traverse the valley's deep divide. There are also a few via ferrata (iron way), preset routes with ladders and cables secured in place to challenge climbers at all stages of competence. Saas-Fee. 027/9574464. www.saasfeeguides.ch.