A huge, now abandoned, antenna system built in the 1970s as part of the Soviet anti-ballistic missile early warning network. It is a huge lattice megastructure with two antennas: the first is 150 meters high and 550 meters long, and the second is 80 meters high and 220 meters long. A small secret city was built to house the radar system, housing 1,000 people. The structure emitted a sharp tapping sound, earning it the nickname “Russian Woodpecker”. It was so powerful that the sounds disrupted legitimate radio broadcasts and communications around the world. After the death of a visitor who fell from the radar, all the ladders were cut down, making it virtually impossible to climb to the higher antenna.