Part 10/16:
In England, an entire nuclear bunker city lies beneath Coram, designed to shelter up to 4,000 people in the event of a nuclear attack. This secretive space features a network of roads meant for a royal escape, equipped with essential facilities for complete isolation.
Napoli Sotterranea, Italy
Underneath Naples, the Napoli Sotterranea tunnels date back over 2,400 years and have housed half a million people over their storied history. Initially constructed by the Greeks and expanded by the Romans, the system served as both a water source and shelter during battles.