The Bunker Complex Ungerberg is a Cold War-era military fortification located in Austria. Built as part of Austria's secret defense network during the Cold War period (1963-2002), this bunker was designed to protect the neutral Alpine republic from potential NATO or Warsaw Pact incursions. The complex features a massive concrete structure with walls two and a half meters thick, demonstrating the extensive efforts made to withstand attacks for extended periods.
The interior of the bunker contains specialized facilities including a telephone exchange for communications, a medical room for treating wounded personnel, and even a niche for coffins, indicating its design for long-term autonomous operation. A decommissioned howitzer remains on site in working condition due to careful maintenance. The complex is now part of Austria's military heritage and represents the country's extensive fortification efforts during the Cold War era.