Project Arado, Underground war museum in Kamienna Góra, Poland.

Project Arado is an underground museum in a mountain town featuring tunnels and chambers excavated into the hillside. The spaces contain military equipment and artifacts from the war period that document the manufacturing operations that once took place there.

Built during the Second World War in what was then the Greater German Reich, the underground halls served the Arado Flugzeugwerke, which set up a bomb-proof production site here. The plant turned out parts for the V1 and V2 retaliatory weapons and produced the Arado Ar 234, the world's first jet-powered bomber. Forced labourers dug out the factory and storage halls so that armaments production could continue safe from Allied air raids.

The museum presents its tour as a "secret mission" in which visitors uncover the "German secrets" hidden in the tunnels, and it markets the complex as "Hitler's Lost Laboratory" (Zaginione Laboratorium Hitlera). The underground halls were built with forced labour, a fact the site's history records alongside the aircraft production.

Wear warm clothing since the tunnels remain cool throughout the year during your visit. The passages are clearly marked and guided tours last roughly one hour through the underground network.

The museum presents the site as "Hitler's Lost Laboratory" (Zaginione Laboratorium Hitlera), and the tour is framed as a covert mission to uncover hidden German secrets. The underground halls were built with forced labour to keep V1 and V2 component production safe from Allied bombing.