Neuschwanstein Castle. Germany. The castle, whose construction began in 1896, was designed by Christian Jank, a theatrical set designer rather than an architect, for Ludwig II of Bavaria who was declared insane before the castle's completion. This explains a lot. The architecture, the location and the size of the Neuschwanstein are spectacular and somewhat crazy. Situated on a rugged hill, in southwest Bavaria, today the castle is one of the country's most popular tourist attractions.