Atomium

The Atomium is an iconic building in Brussels originally constructed for Expo '58, the 1958 Brussels World's Fair. Designed by the engineer André Waterkeyn with interiors by architects André and Jean Polak, it stands 102 m (335 ft) tall. Its nine 18 m (59 ft) diameter stainless steel clad spheres are connected so that the whole forms the shape of a unit cell of an iron crystal magnified 165 billion times.