There are two kinds of World Expos, the International Expo which is held every five years, this is the one which was held last in Nagoya in 2005, and will be held in Shanghai in 2010. Other famous ones are the 1964 New York Fair, 1889 Paris Exposition where the Eiffel Tower was unveiled and the 1988 Brisbane Expo. The other world expo is the International Expositions, this year we have one of those, they are on a smaller scale and open for 3 months instead of the normal 6 but still have some cutting edge innovations, designs and attract millions of people. Zaragoza in Spain is the host for what is to be themed Water and Sustainable Development. A huge 25 hectare site has been created to house this expo and over 40,000 people from all over the world have signed up to be volunteers at the event. Starting on the 15 of June on the banks of the Ebro river the event will be massive. About 100 countries and several large multinational companies are taking part. Highlights of the expo will include a massive 76 metere high water tower and a huge aquarium featuring the world’s great river systems with animals from the Nile, Mekong, Amazon, Murray Darling, Ebro and many of the worlds oceans. Already season tickets have sold out and day passes are selling like hot cakes.