Ponte de Dom Luís I is an iconic iron bridge located in the city of Porto, Portugal. Built in 1886, this bridge spans the Douro River and connects the cities of Porto and Vila Nova de Gaia. It
From Wikipedia
The Luiz I Bridge, commonly known as Dom Luís I Bridge, is a double-deck metal arch bridge that spans the river Douro between the cities of Porto and Vila Nova de Gaia in Portugal. At its construction, its 172 metres (564 ft) span was the longest of its type in the world. It can be confused with the nearby Maria Pia Bridge, a railway bridge that was built 9 years earlier, which is similar in aspect to the Luiz I bridge.