The last picture of July on my memorycard is a bunker of the US Army.
In the middle of the Mannheim-Käfertaler forest is a huge bunker area of the US Army. The bunkers are all cleared and some are open. The area was also used by the German Army during WWII. means some of the bunkers are still from this time. The area generally called “Panzerwald” (tank forest) by the residents.