Referred to as one of the most amazing buildings in the world, the Atomium in Brussels is definitely one of the must see attractions of the Belgian Capital, situated on the outskirts of Brussels towards the north of the city. This eyecatcher is built for the Brussels Worlds Fair, which was held from 17 April to 19 October 1958. (commonly known as Expo 1958) The Atomium is designed by architect André Waterkeyn. It took 18 months to construct it. Symbolising a crystallised molecule of iron by the scale of its atoms, magnified 150 billion times.