Zarechny, called Penza-19 in 1962–1992, is a closed town in Penza Oblast, Russia, located 12 kilometers east of Penza. Population: 63,601; 62,970.
Wikipedia https://en.wikipedia.org/wiki/Zarechny,_Penza_Oblast
Coordinates 53°11'45.65" N 45°10'9.382" E
