If your trip to Cologne is all locked in but your travel itinerary is a bit on the empty side, we can give you a helping hand.You'll need to rise early if you're planning to see all the interesting sights this place has to offer. Cologne Cathedral and Romano-Germanic Museum are no-brainers. City Hall and Wallraf-Richartz-Museum shouldn't be overlooked either.Close to the center, Cologne Zoo is one attraction you might like to consider adding to your to-do list. If you still have room on your travel schedule, Chocolate Museum and Musical Dome will keep you occupied too.