The public transport system includes buses, trams, the metro (U-Bahn) and city tram (S-Bahn). Sight are rather scattered, so you might think about a 24-hour-ticket which is available for two different zones. If it is getting late, you can use the Night bus.. they run only on saturdays and Sundays and depart at 1.15 am and 2.30 am from the Schloßplatz (New Palace grounds).