One of Porto's most important symbols, the double-decker Luis I Bridge spans the Douro River, linking Vila Nova de Gaia to the bustling downtown area of Ribeira. It was built between 1881 and 1886 next to an existing bridge it has been replaced. The granite pillars of the original bridge are still in In its place, stands on the Ribeira like a pair of huge gate pillars. One of the outstanding features of this bridge is the presence of a private pedestrian walkway, which provides a wonderful view of the city of Porto and its wonderful sights.