 Maria Pia Bridge

The Maria Pia Bridge (in Portuguese "Ponte de D. Maria Pia", commonly known as "Ponte de Dona Maria Pia") is a railway bridge built in 1877, and attributed to Gustave Eiffel, situated over the Portuguese northern municipalities of Porto and Vila Nova de Gaia.Part of the Linha Norte system of the national railway, the wrought iron, double-hinged, crescent arch spans , over the Douro River.