The excellent national memorial site for the divided Germany has a documentation centre covering the Berlin Wall's history in text and dramatic film footage. An unscathed section of Wall runs along the street; walk behind it to peer through a crack in the Hintermauer rear wall to see a preserved section of death strip as it looked in the 1980s, complete with a patrol road, wires and a watchtower. Nearby, the wooden Chapel of Reconciliation is built on the spot of a church demolished to make way for the border defences. Walk on towards Mauerpark for several more open-air exhibitions.