The double-deck iron bridge that arcs over the Douro between Porto and Vila Nova de Gaia, designed by Théophile Seyrig — Gustave Eiffel's partner — and finished in 1886. The upper deck now carries the metro and a pedestrian walkway with the best view in the city. The lower deck takes you to the port wine cellars on the Gaia side. Cross in both directions at least once.
Ponte de Dom Luís I
Iconic double-deck iron bridge with the best city views