Valkenburg Castle is a ruined castle in Valkenburg aan de Geul, Netherlands. It is unique in the Netherlands in that it is the only castle in the country built on a hill. The castle is listed in the top hundred of Dutch cultural monuments.
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Address 7 Kasteelsteeg, Valkenburg 6301BR, Netherlands
Coordinates 50°51'42.995" N 5°49'50.922" E