森德灵门
At "Hauptbahnhof", there is a second U-Bahn station for lines U4/5 at a higher level, giving a total of six U-Bahn tracks. "Sendlinger Tor", "Odeonsplatz" and "Olympia-Einkaufszentrum" also each have two quite separate stations at different levels, connected with each other by escalators and elevators.