This is Castle Devin or Dévény in Slovakia (still the trip in Brno :). Halfway we visited this castle where it' used to be the border of Austrian Empire and Hungarian Kingdom. Now it's border of Slovakia and Austria. The ruins are now being a museum, you can visit it on a 80 meters high hill from April to November. It is only 13 km far from Bratislava, the historical center of capital of Slovakia.