At the end of last July, Prince Muhammad bin Salman announced The Line project which will be the largest building in the world with a length of 170 km and a height of 500 meters. When it was announced, many felt that The Line located in NEOM was just a concept and would not be able to be built.
But video taken by drone firm Ot Sky shows construction of the giant in-wall dam has already begun. Dozens of trucks and backhoes were seen digging the underground foundation for The Line. This is believed to house an underground train system that can take passengers from one end of The Line to the other in just 20 minutes.
Construction will be done in stages with it expected to be completed as early as 2030 and cost $1 trillion.
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