I was driving my bike over there cuz its very very close to the place i live, there are many other Flak Towers in my city aswell
During the World War 2, military authorities chose the Augarten as one of several places to erect massive buildings for anti-aircraft defence (flak towers) to protect the inner city from Allied bombing. During summer 1944 the construction of a 55-metre (180 ft) high tower with platforms for anti-aircraft guns and nearby also a 51-metre (167 ft) high control tower was begun but not finished. Their remains are still visible in the middle of the park. Moreover, during the war hundreds of cubic metres of rubbish were dumped on the site whilst armoured vehicles criss-crossed the garden and - as it is supposed - common graves were dug for hundreds of war victims.