Kaiser Wilhelm Memorial Church

The Kaiser Wilhelm Memorial Church at Breitscheidplatz was gutted by Allied bombing in 1943, and rather than demolish or fully rebuild it, postwar Berlin chose to preserve the shattered old tower — nicknamed the 'hollow tooth' — as a permanent anti-war memorial, adding a strikingly modern hexagonal church of blue glass mosaic alongside it in the 1960s. Inside the old tower a small museum displays surviving mosaics and photographs of the original neo-Romanesque interior, while the new sanctuary's glass walls create a quiet, luminous space that feels entirely different from the ruin outside. It's free to enter and quick to visit, though reviewers note the climb to the viewing platform demands some stamina. Sitting at the heart of the Breitscheidplatz shopping district, it works well as a short, thought-provoking stop between errands or shopping on the Ku'damm.