architecture, berlin, building, capital city, german, germany, east berlin, europe, tram, metro, center, neighborhood, block of flats, prefab, vacations, sightseeing, skyline, transport, road, underground, traffic, destination, subway, urban, west berlin, crossing, road crossing, alexanderplatz, berlin, german, east berlin, east berlin, east berlin, east berlin, east berlin, metro, road, subway, subway, subway, alexanderplatz, alexanderplatz, alexanderplatz