Harnekop Bunker, Nuclear command bunker in Prötzel, Germany.

The Harnekop Bunker is an underground facility in Prötzel built with heavy concrete construction and multiple levels beneath the ground. The structure contains various rooms equipped with technical systems for supply and operational maintenance.

Built in secret from 1971 over five years, the bunker served as the main command post of the East German Ministry of National Defence and the National People's Army in the event of nuclear war. It was camouflaged as a flight weather station and went undetected by NATO intelligence. It was first revealed to the public in 1990, on the day of German reunification.

Visitors can explore the facility through organized tours where knowledgeable guidance is provided. It is advisable to check opening times beforehand and wear appropriate clothing as the underground area is cool.

The bunker was disguised as a flight weather station, and NATO intelligence never detected it; it was first revealed to the public in 1990, on the day of German reunification. Its cover name in the NVA communications system was HNZ-8, auxiliary communications centre 8.