The Bunker Complex Ungerberg is a Cold War-era military fortification located in Austria, built as part of the country's secret network of defensive structures during the East-West tensions. This bunker was designed to withstand prolonged attacks, featuring a massive two-and-a-half-meter-thick concrete casing that provided protection against potential invasions by NATO or Warsaw Pact forces. Inside, the facility included essential installations such as a telephone exchange, a medical room, and even a niche for coffins, reflecting its intended use as a self-sufficient defensive stronghold.
The complex also housed a howitzer, which, though decommissioned, remains in working order thanks to careful maintenance by the Museum of Military History.