You’ll need to plan carefully for a thorough exploration of Berlin; with a total area of 880 sq km (340 sq miles) it is bigger than most European capitals. Since the reorganisation of the municipal transport system, virtually the whole of the city is accessible via underground (U-Bahn), district railways (S-Bahn), bus or tram. You should have no difficulty in reaching the outlying areas, including Grunewald and Potsdam, by public transport, which runs 24 hours a day. There is absolutely no need for a car in Berlin.