Footage released by aerial photography company Ot Sky shows work commencing on The Line megacity, which is being built as part of the Neom development in Saudi Arabia.
The drone footage shot by Ot Sky shows construction underway on the linear city, which is being built in the northwest of Saudi Arabia.
In the video, numerous excavators can be seen digging a wide linear trench in the desert. Within the trench, foundations for the city, which is planned to be 170 kilometres long, are expected to be built.
Footage reveals The Line megacity under construction in Saudi Arabia
The works could also show preparation for an underground transport system that is planned to be built underneath the length of the city.
Unveiled earlier this year, The Line has been designed to house nine million people. It will be 500 metres tall and have a mirrored facade.
Read: Sustainability and liveability claims of Saudi 170-kilometre city are "naive" say experts

Following its announcement, numerous people were unconvinced that the project would be realised, with one Dezeen commenter stating: "If this gets built I will eat everybody's hat".
However, the footage suggests that work on the city is now underway.
The city will stretch for 170 kilometres
Speaking to Dezeen in an exclusive interview, Neom's executive director for urban planning Tarek Qaddumi said that The Line megacity will "revolutionise our current way of life"...