The Daugavpils Shot Factory is the only ammunition production factory in the Baltic which is open for tourists and where you can see the oldest shot casting tower in Europe, which is functioning also nowadays.The entire production part is newly insulated, without height bridges. 30 cm of cotton wool on the roof, 10 cm on the walls above 50 cm silicate bricks.Recovery equipment. Exchange of warm air to reduce heating in winter. Tower with old equipment.Equipment from the 19th and 20th centuries. Only in Latvia, the Baltics, Eastern Europe, maybe even in the world. Invest in history.