Greenland's Grand Canyon or Grand Canyon of Greenland is a tentative name for the canyon of record length discovered underneath the Greenland ice sheet as reported in the journal Science on 30 August 2013 (submitted 29 April 2013), by scientists from the University of Bristol, University of Calgary, and University of Urbino, who described it as a mega-canyon.

The Atomium is a building in Brussels originally constructed for Expo 58, the 1958 Brussels World's Fair. Designed by the engineer André Waterkeyn and architects André and Jean Polak, it stands 102 m (335 ft) tall. It's 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.