Bilbao Metro
Bilbao, Spain, 1988-1995
The Bilbao Metro is unusual in that it was conceived as a totality: architectural, engineering and construction skills were integrated within a shared vision. The dramatic curved forms of the stations offer flexibility for future change and the curved glassy structures - or ‘Fosteritos’ - at street level are as unique to Bilbao as the Art Nouveau Metro entrances are to Paris.
Extraído de la página web de Foster.
http://www.fosterandpartners.com/Projects/0445/Default.aspx