On a budget, skip Panoramapunkt (Potsdamer Platz) — the spend outweighs the payoff.
~€9–11.50
It's the cheaper, calmer skyline alternative to the TV Tower — an open-air terrace with a tidy exhibition on Potsdamer Platz's history and good light at sunset. The catch: it's lower than the Fernsehturm and the view skews toward modern office towers rather than the historic core.