Imagine you have a guest from the USA. What places of interest would you like to take her him and why?

Good Morning, my American FriendAre you excited about visiting me in Berlin, Germany? I hope so as we are about to visit one of the best attractions that can be found in here. Although, don\'t assume that we will only see the tourist places. I plan on taking you to the unfound underground spots so you can see a true side of Berlin.Best Regards