The main train station is Köln Hauptbahnhof, which is a busy transportation hub. International trains including high-speed connections to Paris and Amsterdam pass through Cologne, and there are excellent connections to all major German cities. S-Bahn commuter trains leave from the last two platforms, while U-Bahn metro trains depart from the station underneath Hauptbahnhof. The station itself is a mini shopping centre, and contains bars, restaurants, post office (open 06:00-22:00, Sun 10:00-18:00), ATMs and a small, pricey supermarket. Most of the stores within the Hauptbahnhof operate between the hours of 08:00 and 21:00, while the station itself is open 24 hours to cater for overnight train passengers. There is a police station located at the front of the station, and constant police patrols keep the riff-raff at bay.