Rubble Hill is one of many hills in Germany that shares a unique characteristic; it is a hill that was built by rubble from World War II. Today Birkenkopf in Stuttgart is surrounded by forests and trails for walking and biking, and much of the rubble has been slowly covered up by greener pastures. There are still a lot of remnants that can be seen and the top of the hill has quite a few large slabs of stone piled up.