The west zone railway extension is a track that got lost in the city. The closing of stations, the launching of other transportation systems and the proliferation of buildings disappear from view of São Paulo's inhabitants.

Ciro Pirondi rescues that itinerary. Installing 60 light spots along a certain part of the railway, he fixed new stakes _ now immaterial, luminous _ that demarcate the guiding lines of the city's history. These beams, rising to the height of the larger constructions, form a light curtain, shaping the swamps that extend between the hills and the buildings.

It inverts the device of aligned lightning rods that Walter de Maria created to beacon the desert, Pirondi engendered a way of tracing a route that organizes the chaotic and indistinct fabric of the city.