Dom Luis I Bridge

The bridge is the shortest way to understand Porto's shape. A single wrought-iron arch spans the Douro gorge and carries two decks: the upper one, level with the cathedral terrace and the Serra do Pilar hill, takes the metro and a walkway; the lower one, down at quay level, carries traffic between Ribeira and the port lodges of Vila Nova de Gaia. It opened in 1886 to a design by Theophile Seyrig, who had worked with Gustave Eiffel on the older railway bridge upstream. Crossing the top deck puts you above rooftops, boats and both riverbanks at once. The bridge was added by name to Porto's UNESCO listing in 2016.

What you actually see

• The upper deck walk - rooftops, river and both banks from the level of the metro track.
• The lower deck - the quay-level crossing between Ribeira and the Gaia waterfront.
• Serra do Pilar terrace - the round cloister hill at the Gaia end, looking straight down the arch.
• The ironwork - riveted lattice and the single arch springing from the gorge walls.

When to go

Sunset draws the biggest crowd to the upper deck and the Gaia side, so arrive early for space at the railing. Mornings are quieter and the light falls on Ribeira instead. Winter is windy up top and the exposed deck feels it. The metro runs late, which makes an evening crossing easy.

Honest expectations

The upper walkway is narrow, shared with metro trains passing a metre away behind a low barrier, and crowds bunch on it at sunset. Anyone uneasy with heights should take the lower deck instead. The climb from Ribeira up to the top is steep, unshaded and longer than it looks. The lower pavement sits right beside traffic and is loud.

Nearby

Ribeira's quay, the Gaia port lodges and the Serra do Pilar cloister are all within ten minutes.