13 Abandoned Cold War Bunkers Hiding Incredible Secrets

10. Burlington Bunker (Corsham), UK: Britain's Secret Underground City

Vaster and more secret than Kelvedon Hatch, the Burlington Bunker near Corsham, Wiltshire, was an enormous underground complex designed to house up to 4,000 key government personnel for months after a nuclear attack. Built within converted Bath stone quarries, it reportedly contained offices, dormitories, kitchens, hospitals, its own lake, and even a BBC studio. Its true scale and specifics remained highly classified for decades. While largely decommissioned, its immense size and the decades of secrecy surrounding this subterranean 'city' make it legendary.