Kreuzenstein Castle, Austria.
Most people who visit Vienna (and it seems like the whole world visits Vienna) don’t go to Kreuzenstein Castle. In fact, most people haven’t even heard of Kreuzenstein Castle. Only discovering its existence by perusing a list naming Austrian castles, I knew nothing about it this impressive building overlooking Vienna and the Danube. Even after deciding to go, the internet yielded surprisingly little about this magnificent pile of stone only 3o minutes from the Prater station in Vienna. The castle itself was once a 12th-century medieval castle but then destroyed in 1635, at the end of the 30-Years-War. Finally rebuilt in the 19th century by Count Nepomuk Wilczek, the ambitious Count wanted to make it as authentic as possible. He purchased various pieces of medieval buildings from all over Europe (Romanian cloisters, German wattle-and-daub buildings, bits of other European buildings), making it one-of-a-kind. It has also been used in BBC series, Pillars of the Earth and World Without End.