This is the west's strangest walk: a monumental 1936 stadium, the propaganda field behind it, and two of the twentieth century's boldest housing-and-art statements, all within a short loop. Three and a half kilometres, treated as architecture and history rather than spectacle. Read the buildings; don't cheer them.
From the station, walk to the Olympiastadion — a limestone bowl sunk into the ground so it looks modest outside and overwhelming inside. The 1936 Games happened here, and you carry that knowing as you look; the newer red roof and the open marathon gate help you see it as a building too. There's a self-guided route most days.
West across the vast Maifeld to the Glockenturm, where a lift lifts you to a platform with the whole Olympiagelände below and the Grunewald forest beyond — the view that justifies the trek.
Then south to the Corbusierhaus, Le Corbusier's 1957 concrete slab on pilotis, a vertical village still lived in. Finish at the Georg-Kolbe-Museum, the sculptor's studio set in a garden of bronzes — a café, a courtyard, and the quiet you'll want by now. Shut Mondays.

