Schloßstraße 1, 66687 Wadern, Germany
It also called Burgruine Dagstuhl or Burg Dagstuhl. It is a ruined castle on the top of a hill near Wadern town in Saarland, Germany. Knight Boemund of Saarbrücken found the castle sometime before 1290. It overlooks the newer Schloss Dagstuhl (now a computer science research center) in the valley below.
Location of Burg Dagstuhl