Deutsche Bahn (www.bahn.de)  runs comprehensive and efficient rail services, including high speed InterCityExpress (ICE) trains. There is a telephone number for national rail enquiries Tel: +49 (0)1805 996 633.

The busiest stations in Berlin are:

Berliner Hauptbahnhof

Servicephone City transportation (S- and U-Bahn): 
+49 (0)30 29743333

Servicephone regional and mainline trains: 
+49 (0)1805194195

Connected to the following public transportation lines:
S5, S7, S75, S9,  busses, TXL bus, regional and mainline trains

Bahnhof Zoologischer Garten, 
Hardenbergplatz 11 
10623 Berlin (Charlottenburg)
Tel: (030) 2974 9241 
Fax: (030) 2974 9159)
Connected to the following public transportation lines:
S3, S5, S7, S75, S9, U2, U9, Bus

Ostbahnhof
Am Ostbahnhof 9
10243 Berlin (Friedrichshain)  
Connected to the following public transportation lines:
S3, S5, S7, S75, S9, Bus

All stations have:
a travel center (opening hours: daily 6.00 am to 10.00 pm), tourist information, post office, bank, shops, newsagents and lost and found service. 

Other stations are:

Bahnhof Lichtenberg
Weitlingstr. 22
10317 Berlin (Lichtenberg)
Connected to the following public transportation lines:
S5, S7, S75, U5, streetcar, bus

Bahnhof Spandau
Seegefelder Straße
13597 Berlin (Spandau)
Connected to the following public transportation lines:
U7, Bus
Bahnhof Wannsee
Kronprinzessinenstraße
14109 Berlin (Wannsee)
Connected to the following public transportation lines:
S1, S7, bus , ferry 10
Bahnhof Flughafen Schönefeld
12521 Berlin (Treptow)
Connected to the following public transportation lines:
S45, S9, Bus

Rail services: 
Berlin is part of the InterCityExpress (ICE) network, with super fast trains  e.g. to Hanover (journey time 1 hour 35 minutes), Frankfurt am Main (journey time 4 hours) or Hamburg ( journey time 1 hour 30 minutes).

Transport in the city: 
The main stations are all connected to the S- und U-Bahn net, that brings you to every destination in Berlin. Taxi  and buses are available outside the main stations.