At the topographical heart of the Exposition, this structure was meant to dazzle the viewer with its size, color, and form. Dazzling white against the green of the hill in the background.
Offering a passage with a bridge over the river was the simplest thing in the world. But the smartest stroke of genius of the three relentless creators of all the buildings of the Exhibition, the Engineers Fenoglio, Molli and Salvadori, was not to simply and easily get the visitors from one bank of the Po to the other. They created a convenient and shaded route in tunnels illuminated by innumerable little windows that open onto the river, and an enjoyable one via the quick transport of the tapis-roulant. The grand bridge, constructed in wood and plaster by Viotti Brothers Co., is 106.5 meters long has 5 arches of 21.3 meters each. Halfway on each abutment there are two bow windows – one for each side – supported by caryatids sculpted by G.B. Alloati. In the middle of each bow window, begin columns by the sculptor Del Santo, with basements holding up Winged Victories by the sculptor Sassi.

Castagneto del Po is a very small "comune" (municipality) in province of Turin, North of Italy.

Vercelli is one of the oldest urban sites in northern Italy. The city is situated on the river Sesia in the plain of the river Po between Milan and Turin. It is an important centre for the cultivation of rice, and is surrounded by paddy fields, which are flooded in summer. The world's first university funded by public money was established in Vercelli in 1228. Today it has a university of literature and philosophy as a part of the Università del Piemonte Orientale and a satellite campus of the Politecnico di Torino.