Danube-3U is a PRO A-35M early warning station that was put into operation in 1978. That was a sensitive military site in Soviet times. Today the place is still guarded safely though it is now possible to get access to some of its parts. It has many construction similarities with Danube-3M that was burnt to ashes and abandoned after that. The station consists of transmission and receiving antennas that are united with a road and cable gallery. It is not possible to enter the territory of transmission antenna due to abundance of soldiers on it. However, the area next to the receiving antenna was under reconstruction and could be entered. Fragments of left equipment. Antenna surface.