Berlin, although a large, capital city, is very easy to get around.
For many visitors to Berlin, the mass-transit rail system is the most convenient way to get around. This system comrises the S-Bahn and the U-Bahn. In addition, there is the Metro (light rail street-car system) and also buses and taxis.
The S-Bahn is the rail network that connects outer-Berlin, suburban areas with the city centre.
The U-Bahn is Berlin's Underground rail system. In Berlin city centre you are never more than a few minutes' walk from a U-Bahn station.