Poilvache Castle is a ruined medieval castle in the Walloon municipality of Yvoir in the province of Namur, Belgium, overlooking the village of Houx from a clifftop on the river Meuse.
Wikipedia https://en.wikipedia.org/wiki/Poilvache_Castle
Official Website http://www.poilvache.be/
Address 5530, Belgium
Coordinates 50°18'18.535" N 4°53'57.174" E