Zaragoza is the capital of the Aragon region of Spain. It is Spain's 5th largest city and an exciting university town. In 2008, Zaragoza is hosting Expo 2008, the latest official World's Fair. The theme of Expo 2008 is 'Water and Sustainable Development'. A programme of events will run between the 14th of June and the 13th of September with daily shows by the famous Cirque du Soleil group.