The most efficient and cost-effective way to navigate Berlin is through its world-class public transportation network (VBB), which includes the U-Bahn (underground), S-Bahn (suburban trains), trams, and buses. For tourists, the U-Bahn is the backbone of city travel, with over 170 stations covering almost every major attraction. The S-Bahn is better for longer distances, such as reaching the East Side Gallery or taking a day trip to Potsdam. A unique "tourist hack" is taking Bus 100 or 200; these are standard public double-decker buses that follow a route passing nearly all the major landmarks (like the Reichstag, Victory Column, and Museum Island) for the price of a regular ticket, serving as a budget-friendly alternative to commercial hop-on-hop-off buses. In 2026, most visitors use the Berlin WelcomeCard, which provides unlimited transit and discounts at over 200 attractions. While Berlin is very bike-friendly and walkable in central areas like Mitte, the sheer size of the city makes the integrated rail and bus system the undisputed best choice for getting around quickly and comfortably.