Monaco (submarine base)

Monaco Submarine Base, located in the French Alps near Monaco, is a large underground facility built during the Cold War to house and maintain submarines and naval equipment. Carved into mountains, it provides a secure, protected space for military operations, repair, and storage, inaccessible to outsiders. Its design ensures safety and secrecy, facilitating rapid deployment of naval forces if needed. While not an active military installation today, it exemplifies Cold War-era strategic infrastructure focused on underwater warfare and defense preparedness.