Cold War museum, Lithuania

In Kaunas, Lithuania, a bunker that was built 20 feet underneath a factory during the Soviet era became a private museum in 2014. It holds more than 1,200 items relating to the Cold War, many of them still functioning, including gas masks, radiation detectors, medical equipment and KGB spying devices. 

Visits to the KGB Atominis Bunkeris (Raudondvario Pl., 164 A, Kaunas, Lithuania; phone +370 8 682 66666, www.atominisbunkeris.lt/en) must be arranged in advance. €6 (near $8).