Berlin public transport is relatively easy to navigate, with tickets valid across the U-Bahn, S-Bahn, trams and regional trains. The city is quite spread out, so you’ll be glad to have some transport to help get you from A to B. There are no ticket barriers for the metro, with residents and tourists using the honor system, but better not to risk a fine. If you’re planning three or more journeys in one day, a Day Ticket (Tageskarte) is a smart move.