Line M1 has been turned into "Il Metro dell'Arte" as six stations have been upgraded with a lot of artworks [danpiz.net]. Museo station accommodates an archaeological exhibit of many objects found during metro construction [umuc.edu].
Tours of the metro system, guided by experts. For dates and reservation contact the tour operator or check their website.
Metro Art Tour: According to the website, guided tours to stations of art take place every Tuesday 10:30, leaving from Toledo station, duration about 90 minutes. Reservation is not necessary. Tour operator: Metro Napoli.
Metro line 1 extension parallel to the coast leads along the ancient city wall through archaeologically interesting territory. Excavated objects are displayed in Museo station. In the future, more stations with archaeological exhibits will follow, including Duomo and Municipio stations (both to be opened in 2011) [9, 15].
Exhibits in stations:
Duomo station (to be opened in 2011): A Roman temple will be part of the station.
Museo: Several original objects found during metro construction are displayed in the station. Many more of them are in the National Archaeological Museum right above the station.
Ring under construction - Line 1 - 26 stations - opened 1993 - to be completed 2020. Spiral - Line 1 - Inclinational spiral at Vanvitelli and Cilea/Quattro Giornate stations, underground, climbing up to 250 m above the city centre.