Porto, Portugal is a river town; it's situated near the mouth of the Douro River. With six bridges over the waterway, Porto is sometimes called the City of Bridges. In this drone video by miguel_40, you'll get bird's eye views of two of the spans. The first is the most famous: the Dom Luis I Bridge, which opened in 1886 and was, for a time, the longest of its type in the world. The second is the city's newest bridge: the Infante D. Henrique Bridge, which is located just upstream from the Dom Luis and opened in 2002.