Dresden is known as the romantic city, but is also known for the extensive (albeit controversial) damage is received in World War II. By chance and purely accidental, we managed to go there on the anniversary of the air raid. Police from all of Germany were there and trains were severely delayed.
Aside from threats of a Neo-nazi protest, nothing happened other than standard memorial services and activities across the city (and of course a harmless small occupy protest or drum circle outside the train station).
The city is scattered with Museums and Palaces, but keep in mind that much is closed on Mondays…which happened to be the day we went. The Zwinger is a world class Museum that hosts numerous artifacts and the Grünes Gewölbe is quite a sight for curio fanatics.