When my father moved to Berlin 40 (!) years ago, he had an office in the Telefunken Haus on Ernst-Reuter-Platz. Whenever I pass it, which is all the time, it makes me think of him. Imagine my delight when our friends told us to meet them for lunch there one day, in the cafeteria on the top floor.
The TU has a cafeteria on the top floor and it's open to the public. You don't need to be a student or an employee of the university, you just need to know where to go (all the way to the top). When you alight, you'll have a pretty spectacular view. Siegessäule! Fernsehturm! If you squint, Brandenburger Tor!
And in the other direction, Bismarckstraße aka Kaiserdamm, Teufelsberg, Funkturm. Plus, solar panels!
The day we were there, the cafeteria was serving vegetarian pasta or Königsberger Klopse with mashed potatoes and salad.
It's cafeteria food, you know, so it's not winning any awards. But it was warm and filling and the capers had a vinegary bite and the salad was fresh and snappy. (Also, uh, it's cheap.) Plus the view is hard to be beat. While we ate and chatted, I liked imagining my 20-something father in his office somewhere below us, doing his math, looking out the window, contemplating his new Berlin life.
Cafeteria TU Skyline
Ernst Reuter Platz 7
(030) 939 39 7780