entrance to the rocks at the regensteinmühle in blankenburg in the sandstone rock landscape. harz national park. saxony-anhalt,

ancient anhalt architecture attraction bastion blankenburg castle climb destination entrance europe excursion forest fort fortifications fortress germany harz heritage hike hiking hill historical history industrial landmark landscape medieval mill mountain national natural nature old outdoor park rainstone regenstein regensteinmühle rock rocks ruin ruined sandstone saxony saxonyanhalt scenery sight stone tourism travel trekking wheel wood