Neuschwanstein Castle near Füssen, Germany

Wikipedia:
Neuschwanstein Castle is perhaps the most famous 19th century neo-romantic castle in the world. Located in Germany, near Hohenschwangau and Füssen in southwest Bavaria, the castle was built by Ludwig II, King of Bavaria, as a retreat and as a homage to Richard Wagner, the King's inspiring muse. It is the most photographed building in Germany [1], although photography of the interior is not permitted[2], and is one of Germany's most popular tourist destinations.