I live in Aachen, Germany, and there are a bunch of these near the tri-border with the Netherlands and Belgium. I think most people don't even know what they are, and some of them are so covered with dirt and vegetation only a keen eye can spot them.
Yes, I tend to search for bullet holes around the city a lot, which is a weird thing to do now that I said something about it.
If you go town through Krefelderstraße there is a bunch of them on the buildings. The cathedral has some places with grenade shrapnel as well. Some iron gates around the city have little indents from bullets as well. There are a bunch of tanks abandoned in one of the forests to the south, near Brand. Some streets have "gaps" where houses were never reconstructed.
70 something years later and the destruction is still very much visible.
Still a very nice piece of history.