This Barcelona City Railway System map is influenced by Antoni Gaudi, the Spanish architect who was famous for his unique designs that can be seen in his works on display throughout the city. His designs are characterised by curves borrowed from nature & by his unique style of tile mosaics. This map visualises the whole city with a neat pattern & irregular curves. The distinct colours of mosaics ensure that fare zones, parks & the Mediterranean stand out. City Railway System is a new approach to projecting the identity of a city onto its subway map. Whereas conventional subway maps aim at conveying information as clearly & concisely as possible, the City Railway System by Zero Per Zero instinctively incorporates symbolic elements of each city into its map while preserving clarity. As a special consideration for tourists, major landmarks & tourist attractions are indicated on the subway maps, so that tourists can easily figure out the quickest way to get to the destination at a glance. The railway map itself is also good as a souvenir.