Satellite map of Flak tower
Flak towers (German: Flaktürme) were 8 complexes of large, above-ground, anti-aircraft gun blockhouse towers constructed in the cities of Berlin (3), Hamburg (2), and Vienna (3) from 1940 onwards. Other cities that used flak towers included Stuttgart and Frankfurt.
Latitude: 52° 30' 32.84" N
Longitude: 13° 20' 12.21" E