The ruins Hohensyburg is definitely worth a visit. As a hiker I enjoyed the view over Hagen and the Hengsteysee. As a contrast, the casino is not far away. I've already found my luck while enjoying the great view.
From here the view is terrific! Every time I visited friends in Dortmund, they brought me here. But also the monument itself, with the 34 meter high tower and the …
The Lenneradweg leads directly along the tributary of the Lenne to the Ruhr. You have a great view of the estuary. The old railway bridge is also very impressive.