A tall and narrow stripe of a city more than 105 miles long, teeming with 9 million residents and running entirely on renewable energy — that's the vision Saudi Arabia's leaders have for The Line, part of a "giga-project" that will reshape the kingdom's northwest.
Newly revealed design concepts show a futuristic walled city — its open interior is enclosed on both sides by a mirrored façade — stretching from the Red Sea eastward across the desert and into a mountain range.
