![One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn](https://preview.redd.it/xz84gkawlku71.jpg?width=640&crop=smart&auto=webp&s=3398fbdb0e17a86e47ce271d9ada72312fc545e7)
One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn
![One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn](https://i.redd.it/i2o2ni3wlku71.jpg)
One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn
![One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn](https://preview.redd.it/cxhc8oxifq881.png?auto=webp&s=e22885077eac6e12329a1745571f10af984e1153)
One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn
![One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn One of WWII flak towers in Vienna, (walls up to 3.5 m (11 ft) thick). After the war, the demolition of the towers was often considered not feasible. Solid infrastructure. : r/InfrastructurePorn](https://preview.redd.it/u3iyroteviy41.jpg?auto=webp&s=fff106c8c7dce1430b42f1efe56d3236e5453728)