Looking along Porto's riverside towards Foz do Douro and the massive Ponte da Arrábida. This bridge was built in 1963 in a style that reflects that of the famous Dom Luis I bridge in the Ribeira. I couldn't say whether this was a nod to history or merely functional given both cross deep ravines.
The structure is essentially the same with the older built exclusively of iron, whilst the newer is iron reinforced concrete. Spanning nearly 500 metres across the river this was the largest concrete arch bridge in the world at the time of building. It carries six lanes of road traffic at a height of 70 meters above the water below.
The Arrabida bridge is the closest to the mouth of the Douro of Porto's 7 bridges.