森德灵门
At the time of National Socialism, from 1936, a network of electric subterranean railways was planned for the "capital of the movement" and construction was begun, but the Second World War put an end to this. The tunnel of today's U6 between Sendlinger Tor and Goetheplatz - including the station there - were already completed in the shell, but still as part of a rapid-transit railway route. This also explains the relative generosity of Goetheplatz (especially in the blockade entrance Goetheplatz does not fit the architecture today) and the narrowness of the present interchange station Sendlinger Tor on the platform U3 / U6. In the Lindwurmstraße took place on 22 May 1938, the groundbreaking ceremony for this tunnel, which should herald the beginning of the end of the tram. By 1941, the shell was completed, first railcars were to be delivered in the same year. The war-related scarcity of resources led to the cessation of this work. The shell was used during the war as an air-raid shelter, of which today still bears inscriptions on the tunnel walls.