Installed in 1969 during Alexanderplatz's redevelopment, this unique clock is now one of the focal points of the bustling square. Divided into 24 sections, according to time zones, it simultaneously shows the time all around the world. Thus, tourists from across the globe can find out what time it is in their home countries.
Wikipedia https://en.wikipedia.org/wiki/World_Clock_(Alexanderplatz)
Address 1 Alexanderplatz, Berlin 10178, Germany
Coordinates 52°31'16.181" N 13°24'47.901" E