 Additionally, there are two regions which are designated as part of the Inventory of Swiss Heritage Sites.The first is the "Schlosslandschaft Ober/Unterrheintal", a concentration of castles that spans Altstätten, Balgach, Berneck and Marbach.The second is the shared, urbanized village of Balgach/Herrbrugg, which is shared between Au (SG), Balgach and Berneck.