Hörder Burg (Hoerder Burg) is an old castle in Dortmund, Germany. Built in the 11th century, the castle was restored in the early 17th century and is now a protected cultural heritage. It is located on a hill, overlooking the city of Dortmund. The four sides of the castle are surrounded by a large park and there are several walking paths in the park itself. The castle is open to visitors, with guided tours available. Visitors can admire the castle's architecture and learn about its history. Hörder Burg is also a popular destination for picnics, and there is a playground for children.