If you are planning, or have already booked, a trip to Hanoi, you probably should check the best things to do in Hanoi in advance.
Above all, the extensive range of exclusive activities will definitely make your stay in Hanoi unique.
In Hanoi you can have extraordinary experiences that you will look back on for a long time. It is most recommended booking those activities in advance, if you do so you are guaranteed to get a ticket plus you will have more free time on your vacation :)