Inaugurated on June 30, 1878, in the midst of iron architecture, under the risk and calculations of the prestigious Casa Eiffel, the metal bridge over the River Lima not only allowed for rail traffic, but also replaced the old wooden bridge. which connected the yard of São Bento in Viana to the left bank of the river Lima (Darque). At five hundred and sixty-three meters long and six meters wide, more than 2,000,000 kilos of iron were needed to build the decks that rest on nine pillars in granite stonework, whose foundations reach 22 meters.

Those who enter the city crossing the centenary Eiffel Bridge, observe a magnificent view over the Lima estuary, the entire city of Viana do Castelo and the hill of Santa Luzia.
The Viana do Castelo Road and Rail Bridge, better known as the Eiffel Bridge, is a structure that carries the Minho Line and National Road 13 over the Lima River, next to the city of Viana do Castelo, in Portugal. It connects the parish of Santa Maria Maior, in the city of Viana do Castelo, to Darque, on the site of Cais Novo, in the municipality and District of Viana do Castelo.
This bridge has a total length of about 645 m and is considered, due to its dimensions, as a monumental work.

Source: http://www.cm-viana-castelo.pt/pt/percursos-culturais