rent a canoe or kayak and explore the waterways along the Alster.
You will be surprised how beautiful Hamburg looks from the water side.
Hamburg has more bridges than Venice!
The drive along the canals is always worthwhile. Because that's exactly what Hamburg is. If one imagines that only marshes and canals used to be here before the settlement, man has set his mark here. But exactly these points, where a canal has grown as in the jungle, or the bogs in the north - that is then Hamburg's origin.