Bilbao is the heart of a metropolis with a population of more than a million people. It is the driving force of social and economic development and it is the main factor in the modernization of the Gulf of Biscay. Ambitious architectural and general infrastructure projects have fuelled the urban and financial regeneration of the city. The Guggenheim Museum; the Euskalduna Concert Hall and Convention Centre; the underground, built by Norman Foster; the airport, built by Calatrava; the new tram and the projects by architects such as Arata Isozaki and Cesar Pelli are all examples of the overwhelming vitality that permeates Bilbao. Situated in the Territory of Bizkaia, the city is surrounded by fertile landscapes, with forests, mountains, beaches, and steep coasts that make Bilbao an excellent destination for any traveler. The modern network of transport and roads brings the nearby Basque capitals like Vitoria and San Sebastian much closer.