Bilbao, the most important city in the Basque Country, in the North of Spain. Since the opening in 1997, when the "Gu" began drawing the crowds with the force of an alien spaceship, Bilbao has risen from its knees and prospered. Now, with restored self-esteem, what they'll tell you in Bilbao is that there's much more to the city than a single, world-class, glittering showpiece. Bilbao has kept up the architectural momentum since Gehry left. Santiago Calatrava's new airport, a graceful bird poised for flight in the green landscape, is all daring organic shapes, as clean and white as bone. Calatrava has also spanned the river close to the Guggenheim with his Zubizuri footbridge, strung like a great harp over the water.