Porto From the Gaia Side: The Dom Luís I Bridge View and How to Get It
You can't see Porto properly from Porto. The old town climbs a steep bank above the Douro, and from inside it you get stairways, tiled facades and laundry. To see the whole thing you have to cross the river to Vila Nova de Gaia, climb a little, and turn around.
The view in the panorama below is the reason. The Ribeira waterfront stacked up the hillside, the cathedral and the Clérigos tower on the skyline, the river wide and slow, and on the right the iron arch of the Dom Luís I Bridge leaping from bank to bank.

The bridge
The Dom Luís I opened in 1886, its upper deck first and the lower one a year later. It was designed by Théophile Seyrig, who had worked with Gustave Eiffel, and you can see the family resemblance: riveted iron, a single huge arch, nothing hidden.
The two decks do different jobs. The lower one carries cars and pedestrians at river level between the Ribeira and the Gaia port wine lodges. The upper one closed to cars in 2003 and since 2005 has carried Metro line D, with walkways on both sides. Walk it. Trains glide past at a stroll, there's a long drop to the river through the rail, and the view in both directions is the best free thing in Porto.
Where to stand
Jardim do Morro. The garden at the Gaia end of the upper deck, right by the metro stop. At sunset it fills with locals, students, a guitar or two and people sitting on the grass. The sun drops toward the sea downriver and turns the Ribeira orange.
Serra do Pilar. Above the garden, the round church and terrace of the old monastery give the highest view, looking straight down the river and across the bridge to the old town.
The Gaia riverfront. At water level, outside the port lodges, you get the Ribeira across the river and the rabelo boats, the old flat-bottomed wine barges, moored in front. Good at any hour, since the Porto bank faces the sun all day.
Making a day of it
Walk over the upper deck in the late afternoon, catch sunset at Jardim do Morro, then take the cable car down to the Gaia riverfront or walk the steps. Spend the evening at a port lodge or a riverfront restaurant, and walk back across the lower deck with the Ribeira lit up in front of you.
A practical note: Porto's tourist tax has been €3 per person per night since December 2024, for guests aged 13 and over, up to seven nights.
More of the city from both banks: Porto, Panoramic and Alive and Porto Iconic on Travel Marketing.