The Vasco da Gama Bridge (; ) is a cable-stayed bridge flanked by viaducts and rangeviews that spans the Tagus River in Parque das Nações in Lisbon, capital of Portugal. It is the longest bridge in Europe (including viaducts), with a total length of , including for the main bridge, in viaducts, and in dedicated access roads. Its purpose is to alleviate the congestion on Lisbon's other bridge (25 de Abril Bridge), and to join previously unconnected motorways radiating from Lisbon.