BerlinWalk tool
Forty years of division left Berlin with two of almost everything, and the copies are still standing on opposite sides of a border that is no longer there. Pick the one you would actually go to and the map draws the day you have just made.
The dashed box is the centre, where nine of the pairs sit almost on top of each other. Same data, zoomed in.
Your Berlin
Nothing picked yet. Every line on the map joins one pair, and the length of the line is what the division actually costs you in travel time.
Coordinates from OpenStreetMap. Sector outlines are the 1989 boundary.