This just might be the prettiest, coolest, you-name-it-est metro station I've ever seen. The Toledo Metro Station, part of the Naples Metro system, follows the theme of water and light. It was designed by the architecture firm of Oscar Tusquets Blanca and features mosaics, light panels, and art by a number of artists. The station is just one of many that are part of the Naples Metro Art Stations program. Naples is setting the bar high for the other subway systems of the world and you can view all the stunning stations on the program's website.
(found and images via The Cool Hunter)