Hallstatt Salt Mine, Empress Christina Stollen gallery, Salzkammergut, Upper Austria, Europe

abandoned austria austrian christina closed disused door doors empress entrance entrances entry entry way entry ways entryway entryways erstwhile europe european former formerly gallery graduation hallstatt heritage in industry inoperative making mine mine mineral minerals minery mines mining nobody of once one one time open opened openly out out of service out of use past production refinery salines salt salt saltern salzkammergut seeing service sight sights site sites stollen the time times tourist tunnel tunnels underground unesco upper use way ways works world worth