Festungswerke Solothurner Jura

The Verein Festungswerke Solothurner Jura (VFSJ) preserves and presents the network of fortress works ("Sperrstellen") and bunkers in Switzerland's Solothurn Jura. The association — founded in 2000 and based in Welschenrohr — opens its installations to the public for visits, exhibitions and lectures, presented in two sectors (East and West) of the Solothurn fortified line.