Kaiser Wilhelm Memorial Church is a real time commitment — fit it in only if it's a priority.
Allow 20–40 min.
The jagged 'hollow tooth' spire deliberately left in ruins, paired with the cobalt-glass modern hall, is a quietly powerful anti-war statement — and free. The catch: it's a quick stop surrounded by the busy commercial Ku'damm, and there's little beyond the two interiors to hold you.