Kaysersberg : Château du Schlossberg 
Description
Located high above the town centre the ruins of the castle can be accessed via a stiff 5 minute climb up steps. Just parts of the curtain wall and one circular tower remain. The steps in the circular tower have been replaced with modern concrete steps so it is possible to climb to the top, though take a torch as when I visited many of the lights were out of action - just about doable on the way up, but dangerous on the way back down. From the top the views over the town and over the flat lands beyond into Germany are excellent.
Charge
Free
Getting There
Latitude: 48.140383; Longitude: 7.262319
What3Words: quad.keypads.freshen
