The former naval radio station "Goliath" was built by the German Navy during World War II as a longwave transmitter northeast of Kalbe (Milde). Construction began in 1941 and was completed after only 27 months in the spring of 1943. With a transmission power of up to 1,000 kilowatts, "Goliath" was considered the most powerful transmitter in the world at the time. Its primary purpose was to communicate with submerged submarines via longwave in the frequency range of 15 to 60 kHz. The range was over 10,000 kilometers, and submarines could be reached even at depths of up to 12 meters.
The antenna system consisted of a huge umbrella antenna attached to a total of 18 masts – 15 grounded lattice masts, each 170 meters high, and three insulated tubular masts, each 204 meters high. The entire site covered approximately 270 hectares and housed, among other things, the main building with the broadcasting center, offices, recreation areas, storage facilities, and a diesel bunker with a capacity of 120,000 liters. A rail connection provided for the delivery of materials and fuel.
After the end of the war, the facility was dismantled by the Soviet Union and rebuilt near Nizhny Novgorod, Russia, by 1952. There, it was in operation as the Soviet Union's first longwave transmitter and remains active to this day. Today, the so-called "Goliath Site" between Kalbe and Altmersleben commemorates the site's former military significance.