Switzerland is the only country in the world with enough bunker capacity to shelter its entire population, with roughly 370,000 facilities equipped with air filtration systems, toilets, bunk beds, food and water supplies, and backup power sources. Switzerland has upheld the principle of “a shelter for every inhabitant” since a 1963 federal law required that all residents have access to a protected space near their home. As of 2026, the country maintains around 370,000 shelters, offering more than 9 million total spaces—enough to cover over 100% of its permanent population. This makes Switzerland unique in having infrastructure capable of housing its entire population in the event of armed conflict or nuclear war. These shelters are built to standardized specifications, typically featuring reinforced concrete structures, blast doors, and NBC (nuclear, biological, chemical) filtration systems to ensure breathable air during emergencies. While the law mandates essentials such as bunk beds, toilets, and water reserves, individuals are generally responsible for supplying food and medical provisions. In peacetime, many of these shelters are repurposed as storage areas, wine cellars, or laundry rooms, though regulations require they can be converted back into fully operational shelters within five days if ordered by the government. Although Switzerland leads in total coverage, countries like Finland and Sweden also maintain substantial civil defense systems, with Finland capable of sheltering about 85% of its population. As of early 2026, Switzerland has invested roughly $1.2 billion to modernize its network, focusing on upgrading filtration systems and improving large public bunkers to keep the system effective against modern threats.(Historic Vids)