Atomium

The Atomium ( ə-TOH-mee-əm, French:, Dutch:) is a landmark modernist building in Brussels, Belgium, originally constructed as the centrepiece of the 1958 Brussels World's Fair (Expo 58). Designed by the engineer André Waterkeyn and the architects André and Jean Polak as a tribute to scientific progress, as well as to symbolise Belgian engineering skills at the time, it is located on the Heysel/Heizel Plateau in Laeken (northern part of the City of Brussels), where the exhibition took place. It is the city's most popular tourist attraction, and serves as a museum, an art centre and a cultural destination.

The Atomium stands 102 metres (335 ft) tall, making it one of the tallest structures in Belgium. Its nine 18-metre-diameter (59 ft), stainless-steel-clad spheres are connected in the shape of a unit cell that could represent an iron (ferrite) crystal magnified 165 billion times. Steel tubes connecting the spheres enclose stairs, escalators and a lift to allow access to the six visitable spheres, which contain exhibit halls and other public spaces. The top sphere includes a restaurant with a panoramic view of Brussels.

Excerpt from Wikipedia: Atomium · CC BY-SA 4.0