Burg Blankenstein is a castle located on the south side of the river Ruhr in Hattingen

Hattingen

Hattingen is a German town located in northern part of the Ennepe-Ruhr-Kreis district, in North Rhine-Westphalia.-History:Hattingen is located on the south bank of the River Ruhr in the south of the Ruhr region. The town was first mentioned in 1396, when the Duke of Mark granted permission to build...

, North Rhine-Westphalia

North Rhine-Westphalia

North Rhine-Westphalia is the most populous state of Germany, with four of the country's ten largest cities. The state was formed in 1946 as a merger of the northern Rhineland and Westphalia, both formerly part of Prussia. Its capital is Düsseldorf. The state is currently run by a coalition of the...

, Germany.

Beginning in 1227, the castle was built over the course of 200 years by the Counts of the Mark. In 1614, shortly before the Thirty Years' War

Thirty Years' War

The Thirty Years' War was fought primarily in what is now Germany, and at various points involved most countries in Europe. It was one of the most destructive conflicts in European history....

, it was occupied by Spanish troops.

The property has belonged to the city of Bochum

Bochum

Bochum is a city in North Rhine-Westphalia, western Germany. It is located in the Ruhr area and is surrounded by the cities of Essen, Gelsenkirchen, Herne, Castrop-Rauxel, Dortmund, Witten and Hattingen.-History:...

 since 1922, but the town is looking for an alternative due to the costs.

The tower can still be visited and offers a good view over Bochum

Bochum

Bochum is a city in North Rhine-Westphalia, western Germany. It is located in the Ruhr area and is surrounded by the cities of Essen, Gelsenkirchen, Herne, Castrop-Rauxel, Dortmund, Witten and Hattingen.-History:...

and the Kemnader Lake.