The Berlin Wall was never just one wall. It was two. It was made up of a pair of concrete barriers separated by the Death Strip, a stretch of raked sand, floodlights, tripwires, and guard towers, stretching for over 150 kilometres around West Berlin. Around 140 people were killed trying to cross it in the 28 years it stood.

What remains today is scattered but deliberate. A metal line embedded in the pavement traces the Wall's former course across the city. Sections of concrete survive at Potsdamer Platz, Niederkirchnerstrasse, and the East Side Gallery. The first traffic tower to remain from the Wall's original design still stands near Potsdamer Platz, its narrow spiral staircase explaining why it was replaced: guards couldn't run down it fast enough.

VoiceMap's Berlin Wall tours follow the Death Strip's path to uncover specific stories, from the soldier who jumped the barbed wire three days after construction began, to Tunnel 57, through which 57 people escaped in two nights in October 1964.