This is the walk that doesn't let you off easily. In under three kilometres it runs from the Cold War's most famous crossing to the ground where the Nazi terror was administered — and then, on purpose, lets you out into the prettiest square in the city.
Start at Checkpoint Charlie. The guardhouse is a replica and the costumed soldiers are a nuisance, but the spot is real, and the four-language sign still says what it said. Pick up the double line of cobbles that marks the Wall and follow Friedrichstraße. West to the Topography of Terror, free and unsparing, built on the site of the Gestapo and SS headquarters — the engine room of everything else.
Outside it runs the longest inner-city stretch of Wall still standing, pitted by souvenir hunters, with Göring's colossal Aviation Ministry looming opposite. Then walk north and let the mood change: Gendarmenmarkt, the Konzerthaus framed by its two cathedrals, is the deliberate exhale. Stadtmitte is a few steps away.
