Russia’s Secret City Exploded... And the KGB Covered It Up

Russia’s Secret City Exploded... And the KGB Covered It Up

Source: YouTube · The Infographics Show · published Jul 1, 2025 · 16:44

Cybersecurity
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Russia’s closed cities are secret settlements built for nuclear, military, and space programs, hidden from public view due to their dangerous infrastructure and sensitive operations 0:10. These cities remain off-limits to foreigners and often lack transparency, with residents living under strict government oversight 0:14.

Key Takeaways:
• Seversk, with a population of nearly 105,300, housed the Sibirskaya Nuclear Power Plant and suffered a 1993 explosion that released radioactive gas, rated a Level 3 incident by the IAEA 1:17.
• Ozyorsk, home to the Mayak Production Association, was the epicenter of the 1957 nuclear disaster that spread radiation over 5,800 sq miles, rated a Level 6 event—second only to Chernobyl 2:59.
• Snezhinsk, despite its pollution, now contributes to CERN’s CMS detector and remains closed, creating cultural shock for visiting scientists 4:51.
• Tsiolkovsky hosts the Vostochny Cosmodrome, reducing Russia’s dependence on Baikonur, though its construction faced corruption allegations 5:48.
• Mirny is home to the Plesetsk Cosmodrome and a massive diamond quarry, with a 2017 flood killing eight people 8:49.
• Znamensk has conspiracy theories linking it to UFOs and secret space missions, despite being a small satellite launch site 9:36.

These hidden cities represent both technological achievements and enduring dangers, with legacy radiation, secrecy, and military priorities shaping their existence.

Sources:

  • 0:10 Introduction to closed citi

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Secret weapons factories! Nuclear 
disasters! Giant pits of doom! Privet! Welcome to Soviet Russia’s best kept 
secret: Closed Cities. These settlements are closed to foreigners, and require special 
government permits if you want to live there. They’re not on any maps, located in remote 
areas, and you might have gotten a visit from the KGB if you broke in. These secret 
settlements sprung up across the Soviet Union in the late 1940s as nuclear and military 
development kicked into high gear for the Cold War. And believe it or not, many of these 
closed cities still exist today - tucked away in Russia and Kazakhstan, sealed 
off from the rest of the world. 15. Seversk Seversk is one of the biggest closed cities on our 
entire list, with a population of nearly 105,300. Located in Tomsk Obl…