Breitspurbahn
The Breitspurbahn (German pronunciation: [ˈbʁaɪtʃpuːɐ̯baːn], transl. broad-gauge railway) was a railway system planned and partly surveyed by Nazi Germany. Its track gauge – the distance between the two running rails – was to be 3000 mm (9 ft 10+1⁄8 in), more than twice that of the 1435 mm (4 ft 8+1⁄2 in) standard gauge used in western Europe.