Neuschwanstein, Schwangau, Germany
You'll be hard-pressed to find a castle this awe-inspiring anywhere else. After all, this is the real-life inspiration behind Disney's Cinderella and Sleeping Beauty Castles. Locals might tell you that it's not worth the 2.5-hour train ride or 2-hour car ride from Munich, but anyone who's been would beg to differ.
Nestled high up in the forests of southwestern Bavaria, Neuschwanstein was meant to be a retreat for King Ludwig II, who built the fairytale castle in the 19th century. Its many towers and turrets are matched by a large and stately interior.