Ride the Stadtbahn (express local trains - not the U-Bahn) from Zoologischer Garten to Berlin Ostbahnhof station for a rooftop view of the many different characters of the city. Start in the heart of the old west and travel via the Tiergarten, new Berlin central station, government district, Freidrichstrasse, Museum Island and Alexanderplatz, ending up in the old East Berlin. Cheap, very frequent and clean. A good alternative is BVG Bus route 100, which links most of the same major sites and sights.
Zoologischer Garten station, just off Kurfurstendamm/Tauentzienstrasse or any S-Bahn station en route, see www.bvg.de for details of Berlin public transport
Send your feedback or queries to been.there@guardian.co.uk
Search Been there