BARCELONA’S metro system is set to open its mysterious ‘ghost stations’ to the public for the first time in history. The star attractions are the Gaudi and Correos ghost stations. READ MORE: Robert Redford’s life in Spain’s Barcelona, Mallorca and Mijas revealed after Hollywood legend dies at 89Since its construction in 1968, the Gaudí station has been closed to the public, becoming one of the so-called ‘ghost stations’ of the Barcelona metro. Visitors will have to walk along the active metro tracks to reach the platform, as the station has no street-level entrance. Beyond the ghost stations, visitors can also peek behind the scenes at the old Urquinaona spiral staircase, the Santa Eulalia workshop (the network’s oldest, dating from 1922), and the ZAL workshop where the systems keeping Barcelona’s metro running are housed.