With over 177 miles of subways, underground tunnels, and deserted quarries under the city of Paris, graffiti artists, painted and creative vandals have taken on the task of transforming these hidden spaces in to a secret urban art gallery. Paris Underground from Mark Batty Publishing explores these eye-catching spaces that have been painted, carved, scribbles and crafted, looking at the culture and motivation of these anonymous artists and their work, which may have otherwise went unseen…