I will be going through Germany next week, and I have a couple days to see the countryside and visit. I am trying to arrange a rental motorcycle in Wuppertal so I can ride to Berlin Friday, then back Sat. So, if the plan works, I will be in the capital Friday afternoon. If I cannot get a bike

I will take a train.
Any suggestions as far as what to see in Berlin?
Danke!
Onkel Neal