It is the most famous symbol for all the residents of the city of Brussels, and it is a must-see while you are in Brussels. It is a unique masterpiece in the history of architecture and a symbolic monument to the World Fair in Brussels. Also here is the giant silver atom that was built at the Expo in 1958 AD, which is worth heading to the top of the building in order to get a wonderful view across the city. It is an iron crystal magnified 165 billion times; The huge steel balls are rooms connected by an escalator between them, and they can be seen from a great distance.