It sounds like something for kids only, but a visit at the Miniatur Wunderland is for everyone!!! It's really amazing what they've achieved there. Try to beat the queues and go there early or book an advance ticket. You should set at least 2 hours aside for this but you can easily spend hours and…
I can also highly recommend the „Miniaturwunderland“: It is a huge and stunning miniature replica of many places on this globe with a lot of attention to detail. Also there it’s recommendable to get a ticket in advance with a timeslot to avoid cues (can be 1-2 hours on weekends).
Die beliebteste Sehenswürdigkeit ist ein Touristenmagnet in Hamburg - Modelleisenbahnlandschaften in der Speicherstadt! +++++++++++++++++++++++++++++++++++++++++++ The most popular sight is a tourist attraction in Hamburg - model railway landscapes in the "Speicherstadt" (warehouse quarter)!
The largest model railway in the world, and one of the most successful permanent exhibitions in Northern Germany.