Library at Pompeu Fabra University — Barcelona, Spain
The building that houses Pompeu Fabra’s library has been through many incarnations. Built as a water tower, it was later used as a fire station, metal institution, and parking garage. It’s connected to other university buildings through tunnels – first used by soldiers. An atmospheric building with an interesting past, its 500,000 volumes are now used by students, in 1,400 possible study desks.