Berlin’s conservation authorities have been working to preserve parts of the border installations since 1990. They were able to get several hundred meters of the outer (“Vorderlandmauer”) and inner (“Hinterlandmauer”) walls and three watchtowers classified as historical landmarks.
The authority for the preservation of historical landmarks provides information on all of the protected remaining sections and traces of the Wall in the city, while the Berlin Wall Foundation’s interactive map helps you to locate these.
Links:
A section of the inner security wall Bornholmer Strasse