Stuttgarter Rundwanderweg:
We went on a walk with some friends and they showed us this really cool historical place that you can hike up to (about 15-20 minutes). The Germans moved all the WWII debris to the top of a mountain. You can walk on top of the sculptures and debris remains. You can see the marking and dates that were marked on the buildings back then. Pretty view also. I also learned that Germans put a cross at the top of mountains sometimes, so if you're driving around you might see some in the mountains and hills!