The Hospital in the Rock Nuclear Bunker Museum is a thrilling, unique and moving place. Visitors can learn about the WWII and the 1956 revolution as well as the Cold War in relation to this former TOP SECRET nuclear bunker. It had an important role during the war and it was classified until 2002 and opened as a museum in 2008. The place ensures a real time warp into the past. Mobiles are not working inside. Do not expect a regular museum. One hour long tour departs every hour in English. Guide books are available in several languages. Unforgettable experience underneath the Castle Hill. The entrance is only about 5 minutes walk from the famous Matthias-Church of Buda Castle.