Kölner Dom, or Cologne Cathedral with the Hohenzollern bridge on the side. I like this photo, because there are so many different lights happening on different texture: Evening sky, cathedral lighting, bridge lighting, reflection on the Rhine. My Nikon captured them nicely despite my lack of knowledge in low-light situations.
Köln was a total surprise. I had not known about the city at all before I visited. It is vibrant city with lots to offer. The main attraction is the cathedral that amazingly survived the war, but the river walk, small museums and many entertainment spots keep calling me to revisit.