Graffiti Train

With so many ceilings and naked statues on offer for photographers, and all very old indeed, I thought I would plump for a not so old train and some quite new decoration that it has received.

This is the underground train in Rome although certainly one of the older sets of carriages they have, most were much newer.

I have to assume that the carriages sit in a siding somewhere where the street artists can get at them, otherwise they are taking quite big risks painting these underground?