If you are visiting Lake Constance in Germany, be sure to check out Burg Meersburg, the old castle. Built in the 7th century, it features sleeping and dining rooms, a kitchen, a dungeon among other fully furnished rooms, and a tower with a spectacular view. You can tour the castle on your own and join a guided tour to the top of the tower. The castle has been remodeled many times by kings and bishops since it was first built, and people still live there today. Oh, and poet Annette von Droste-Hülshoff died here.