The Seoul Metropolitan Government announced its plan on Wednesday to convert 68 kilometers -- or 94 percent -- of the city’s above-ground railway network into an underground network. The space for ground railways as well as station buildings will be turned into parks, and commercial and cultural facilities. Currently, Seoul has 71.6 kilometers of above-ground railway across six lines, running through 15 out of 25 districts. The conversion includes 34.7 kilometers of the Gyeongbu Line and 3