What was and what is Expo now that we can visit it

What was and what is Expo now that we can visit it

Since 1851, every five years, world’s cities host a unique event for six months: the universal exposition. In 2015 it’s the capital of Lombardy’s turn, which on 1st May has opened the door of Expo 2015.     As in any other world exposition, since the first one held in London, the main attractions are