The Atomium in the outskirts of Brussels in Belgium.
Designed by the engineer André Waterkeyn for the International Exhibition of Brussels, that took place here in 1958, the Atomium is a structure that is half way between sculpture and architecture, symbolising an iron of crystal, magnified 165 billion times. (Source: Atomium.be)
These people on the top were cleaning one of the pods. They used a
zip-line to go down. Pretty cool.