Eighteen kilometers for a total of 18 stations, where it is possible to admire 180 works by over 90 internationally renowned architects and artists. These are the main characteristics of the Naples metro, which for tourists and citizens is not only a means of transport, but is also a real open-air museum, thanks to the so-called art stations, which have transformed the city into a large museum of contemporary art in the open air, celebrated all over the world, which can be visited for free or by paying only the price of a single ticket. The most famous station is certainly that of Toledo, which the English newspaper Daily Telegraph and CNN awarded in 2012 as the most beautiful in Europe: designed by the Catalan architect Oscar Tusquets Blanca, it is dominated by the blue of the sea and the sky , and with extraordinary mosaics on the walls dedicated to San Gennaro, a marine corridor and the suggestive Crater de Luz, a gigantic cone from which you can enjoy an unparalleled view of the city waiting for the most beautiful of all, the famous Duomo station, designed by Fuksas that passes through archaeological finds from the times of the isolympic games currently undergoing testing but which is a candidate among the most beautiful ever.