Soča valley is located in western Slovenia and stretches from Triglav National Park to Nova Gorica. It got its name from the Soča, which is a 138 kilometres long and emerald green river that is passing through the valley. Its amazing colour is absolutely natural and is caused by limestone. Nowadays Soča valley is one of the first choices in Slovenia when it comes to outdoor sports, but back in the days of World War I it was one of the major fronts. At this time the Italian and Austro-Hungarian fortified on the different sides of the valley and over 1 million men lost their life in this brutal war. Trails, pillboxes and forts, in and around the valley, still remind of this dark chapter in history.