Grundlsee: gypsum open pit mining in Wienern, company Rigips in Ausseerland-Salzkammergut, Steiermark, Styria, Austria Stock Photo - Alamy
Grundlsee: gypsum open pit mining in Wienern, company Rigips, lake Grundlsee in Ausseerland-Salzkammergut, Steiermark, Styria, Austria Stock Photo - Alamy