“…It is this very capacity to summarise this ambivalence that, according to Mariani & Barron (2014: 6), makes the expression "terrain vague" capable of enclosing within it the different nuances of residual spaces. «Terrain vague, indeed -they write -contains within it a multitude of possible connotations, and is thus well suited to serve as a collective term for various subtypes of leftover land within the edges of the pale-boundaries.» Sometimes urban transformation processes result in the residual spaces disappearing from the life and "routes" of the city, and from its maps, often becoming run-down and abandoned places (see, inter alia, Oxenham, 1966;Barr, 1969;Northam, 1971;Gemmell, 1977;Nabarro & Richards, 1980;Lynch, 1990;Boeri et al, 1993;Pizzetti, 1993;Lerup, 1994;Leong, 1998;Kivell & Hatfield, 1998;Borret, 1999;Doron, 2000;Nielson, 2002;Bowman & Pagano, 2004;Clément, 2004;Berger, 2006), as the missing pieces of spatial and visual journeys that form the structure of the city, between routes, open spaces and built objects (Cecchini & Romano, 2014).…”