Burg Blankenstein
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Burg Blankenstein is a castle located on the south side of the river Ruhr in Hattingen, Germany. Its tower is can be visited and offers a good view on Bochum and the Kemnader See. It was built in 1227 by the earls of the Grafschaft Mark. In 1614, shortly before Thirty Years' War it was occupied by Spanish troops. The facilities belong to the city of Bochum since 1922 but the town is looking for an alternative due to the costs.