The dome, with a diameter of 84 meters, remained intact after months of bombing and has been left to decay for years.
Concrete support pillars keep the 55,000-ton dome in line. The bomb-proof concrete shaft next to the dome can also still be seen. This was intended for the ventilation of underground spaces, where dangerous and explosive gases could escape during the installation of the rockets.
The most significant relic from the Second World War has housed a museum since the late 1990s.