The Ciutadella campus of Barcelona's private Universitat Pompeu Fabra contains a contemporary architectural gem worth seeking out. It's two blocks up from the Ciutadella–Vil.la Olímpica metro stop, just beyond where the tramline out to the Fòrum begins. Once the hydraulic cistern for the Ciutadella waterworks, built in 1880 by Josep Fontseré, the Dipòsit de les Aigües was converted to the school's Central Library in 1999 by the design team of Lluís Clotet and Ignacio
Paricio. The massive, 3-foot-thick walls, perforated and crowned with tall brick arches, are striking; the trompe-l'oeil connecting corridor between the reading rooms is a brilliant touch. Even in humble Barceloneta, there are opportunities for really gifted architects to take a historical property in hand, and work magic.
Ramon Trias Fargas 25–27, Barcelona, Catalonia, 08005, Spain