Underground Cities: Mapping the tunnels, transits and networks underneath our feet by Mark Ovenden
Just how deep do the tunnels go? Where do the sewers, bunkers and postal trains run? And, how many tunnels are there under our streets? Each featured city presents a 'skyline of the underground' through specially commissioned cut-away illustrations and unique cartography.
Drawing on geography, cartography and historical oddities, Mark Ovenden explores what our cities look like from the bottom up.