The Atomic KGB Bunker Museum is a Cold War-era nuclear bunker located in Kaunas, Lithuania. Originally constructed as a secret Soviet fallout shelter, it now operates as a museum showcasing over 12,000 authentic artifacts from the KGB, NKVD, and Soviet militia. The collection includes the largest range of gas masks in the Baltics, rare spy gadgets, secret communication gear, and surveillance equipment. The bunker is situated 6 meters underground and features a private collection described as unique in the world, with more than 1,200 functioning exhibits.
The site provides a direct insight into Soviet-era civil defense preparations and intelligence operations. Visitors can explore the preserved underground chambers and view the extensive displays that illustrate the technological and operational aspects of Cold War surveillance and nuclear survival strategies. The museum stands as a significant historical attraction in Kaunas, dedicated to preserving and interpreting this specific period of Lithuania's 20th-century history under Soviet influence.