Saudi Arabia’s NEOM, which is home to some of the world’s most exciting upcoming developments, has posted construction images showing progress on social media. The flagship project of the $500bn mega-development is The Line, a futuristic city set to become home to 9 million residents. The Line will be 170km long and 500m high, with a footprint of just 34 sq km, and residents will have access to all daily essentials within a five-minute walk, in addition to high-speed rail – with an end-to-end transit of 20 minutes.