I travelled for 3 days to Hamburg, Frankfurt and Stuttgart. It was a really good thing to do, I knew a lot of things and all of them were spectacular to see. I'd love to have the time to write all of what I loved at these three cities, but there is so much I don't want to waste your time. Anyways, I'll tell you some of those things.
Here it is: https://www.thinglink.com/scene/652946197132083201 (I couldn't make it work any other way)
In Hamburg, I visited The Imtech-Arena, which is a stadium of the local football team. It was nice. I also visited the Hamburger Dom, which is a fair, that is really long(3,3 km long). In Frankfurt, I obviously ate some frankfurters, but I also did visited the German Film Museum, which is found in a district called Museumsufer, that is a street with museum of all kinds. In Stuttgart, I visited the planetarium, the only problem was that it was all in german, so I only understood some things. I didn't stayed too long here, but it was the third and last day, so I needed to rest a little bit.