Europe’s westernmost capital was constructed on seven hills beside a natural port where the Tagus River flows into the Atlantic Ocean. Many of Lisbon's streets are too steep for cars and it still relies on three funicular trams as well as a giant elevator (elevador). Lisbon can also boast some stunning feats of civil engineering, such as Ponte 25 de Abril (a bridge named after the 1974 Carnation Revolution), and Ponte Vasco da Gama, which was completed in 1998 and spans more than 17 km. Much of the charm of Lisbon lies in its strong links to its golden past and the evidence thereof, such as its wide black and white mosaic calçada pavements, narrow cobbled streets full of Art Nouveau cafes, lovingly restored palaces and magnificent churches, not to mention the crowning glory of its Moorish castle, which dominates the old town. It is the blend of historical bairros (neighborhood), architecture and culture that distinguishes this capital city from all others.