Polonia are un „oraș” ascuns sub pământ, construit de naziști. Astăzi poate fi vizitat de turiști

Wolin Island, a Polish Baltic Sea vacation spot, conceals a remarkable military complex built by Nazi Germany, now known as Wolin Underground City. Initially constructed in 1936, it served as a coastal defense system with bunkers and command facilities. After WWII, it was repurposed by Polish authorities as an emergency command center. The site features extensive underground tunnels and preserved military equipment, including communication systems and tactical maps. Today, it operates as a museum, attracting around 3,000 visitors monthly, while some areas remain unexplored, adding to its mystery.