Spain: Murcia City Council says that it is building an underground bus depot as part of the upcoming Central Plaza urban space at Barrio del Carmen railway station. Local press has reported that town planning company Urbamusa and architect Javier Peña plan to build the depot using 3D concrete printing. The concrete will be coloured according to its level in the building: blue at ground level, progressing down through maroon and orange to yellow. A ‘large elliptical pergola’ will allow daylight to permeate to the lowest level.