The Falkenhagen Bunker is an abandoned semi-submerged military industrial complex located just north of the town of Falkenhagen in the district Märkisch-Oderland, Brandenburg, Germany. Originally constructed by Nazi Germany during World War II, the facility was designed for the production of N-stoff (chlorine trifluoride), a highly reactive chemical compound. The site was never fully operational before being overrun by Soviet forces in 1945.
Today, it stands as a relic of wartime industrial ambition and military history, offering a glimpse into the underground infrastructure developed during the conflict.