The ‘Mukaab’ is planned for the capital Riyadh (Picture: Murabba/PIF/SWNS)

This is Saudi Arabia’s new futuristic mega project, which could fit at least 20 Empire State buildings.

The ‘Mukaab’, as it will be called, has already been dubbed one of the largest built structures in the world.

Planned for the capital Riyadh, it represents a 400m-high golden cube enclosed in a façade made of overlapping triangular forms.