Trenches at Passo del Verrobbio
At Passo del Verrobbio in the High Val Brembana, the remains of the trenches built by the Italian Army before the outbreak of World War I are still present and visitable. These trenches were constructed in anticipation of a possible breakthrough of the Tonale Front and a subsequent descent of Austrian forces along the Valtellina. Part of the Cadorna Line, fortunately, these defensive structures were never used.