I like castles, and Germany has plenty of castles throughout the countryside. Bavaria is home to many famous castles, and Ludwig II had several memorable ones built, including the castle that Walt Disney based his Disney World castle after. One day I would like to see the remains of Bauernfeind Castle in Bavaria. It's probably a small mound of stones at this point on a grassy knoll, but it would still be cool to stand on that spot.
Ludwig, you see, was fond of Greco and French architecture. A man after my own heart!