| Dom Luís Bridge The Luís I Bridge spans the Douro River between the cities of Porto and Vila Nova de Gaia. |
| Dom Luís Bridge The bridge has two decks. The metro runs over the top deck while motor traffic uses the lower one. |
| Dom Luís Bridge The bridge originally carried roads at both levels. Pedestrians can still cross either deck. |
| Teleférico de Gaia Porto's cable car connects the Cais de Gaia, on the banks of the Douro, with the Jardim do Morro. |
| Teleférico de Gaia The Gaia cable car opened in April 2011. |
| Dom Luís Bridge At the time of its construction, the 172 metre span was the longest of its type in the world. |
| Metro on Dom Luís Bridge Route D of the Metro do Porto occupies the top deck, which is also a pedestrian walkway. |
| Arrábida Bridge The Arrábida Bridge is the most downstream bridge across the Douro River. |
| Dom Luís Bridge Metro tracks on the upper level of the bridge. |
| Metro on Dom Luís Bridge Metro route D, on the Dom Luís Bridge. |
| Funicular dos Guindais The cars are engineered to maintain a constant gradient in the passenger cabin. |
| Funicular dos Guindais The funicular first opened in 1891, but an accident forced its closure just two years later. |
| Funicular dos Guindais After remaining closed for over a century, the system re-opened in 2004. |
| Metro on Dom Luís Bridge This metro line opened in 2005. The upper deck of the bridge was previously used by motor vehicles. |
| Infante Bridge The Infante Bridge opened in 2003, to replace the upper deck lane of the Dom Luís Bridge. |
| Steps The city stands on a steep gradient, on the banks of the Douro River. |
| Primitive Wall
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| Funicular dos Guindais A passing section allows two cabins to operate on the otherwise-single line. |
| Funicular dos Guindais Each of the cabins can carry 25 people. |
| Steps
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| Infante Bridge over Douro River The Douro is the third-longest river in the Iberian Peninsula, after the Tagus and Ebro. |
| Calem Cellars 'Caves Calem' is one of the most famous wine cellars in Porto. |
| Calem Cellars The cellars now also incorporate a museum. |
| Calem Cellars The Calem Cellars sit underneath the Serra do Pilar Monastery. |
| Funicular and staircase A choice of routes to the top. |
| Funicular dos Guindais The funicular offers commuters and tourists an effortless way to climb the 61-meter rise. |
| Metro on Dom Luís Bridge The Porto Metro uses modern Eurotram low-floor, articulated trams. |
| Primitive Wall The Primitive Wall was probably built during the Roman Empire and rebuilt during the 12th century. |
| Portuguese façade A small home beside the Dom Luís Bridge. |
| Laundry in garden The Dom Luís Bridge affords local residents little privacy. |
| Dom Luís Bridge View of the bridge from the northern side of the valley. |
| Typical Portuguese façade
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| Anjo fountain 18th century fountain, featuring a sculpture of São Miguel. |
| Porto Cathedral The cathedral was completed in the 13th century. |
| Porto sunset Silhouette of Porto's Primitive Wall. |
| Porto sunset The sun sets over the Douro Valley. |
| Flying in to sunset A flock of birds fly off in to the sunset. |
| Dom Luís Bridge Looking south across the Dom Luís Bridge. |
| Dom Luís Bridge The Serra do Pilar Monastery, to the left, served as a fort during the 1832 Siege of Porto. |
| Dom Luís Bridge The top deck of the bridge is shared by pedestrians, cyclists and the metro. |