The Berlin S-Bahn is a rapid transit system that serves the city of Berlin and its surrounding areas. It consists of several lines that connect key neighborhoods, making it a vital part of the city's public transportation network. The S-Bahn trains are known for their efficiency and frequency, providing a convenient way for residents and visitors to travel. Operated by S-Bahn Berlin, the system features both above-ground and underground tracks. It covers a wide area, including important destinations like Berlin Hauptbahnhof (the main train station) and Potsdam. The S-Bahn is an essential mode of transport for daily commuters and tourists alike.