The terrains of the Lake Texcoco Ecological Reserve are located right after the line that separates Mexico City from the State of Mexico, to the northeast. Upon crossing this dividing line, many borders are passed through simultaneously. One transits across a political division between city and non-city, in which all traces of urbanization disappear abruptly. There is also the crossing of a geographical division between city and countryside, the urban and the rural: a saline country of scarce vegetation, a flat, open plateau, alien to the intricate, sunken topography of Mexico City. A division in climate is also crossed, perhaps this being the most surprising of all, as it is felt in the body: as one passes from the central city to the peripheric state, temperature rises by a couple of degrees, the heaviness of pollution diminishes, and the air becomes noticeably dry whilst emitting a strong smell of salt.  [...]