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This is what Saudi Arabia's 100-mile long emission-free smart city could look like. View more [MUSIC PLAYING] -Countless governments and companies have taken a stab at building a city of the future.

It is one of several developments that form the country's NEOM project - which also includes an industrial city ... 10,000 square miles. READ MORE: Saudi Arabia's 100-mile-long and 1,500ft ...

A report has claimed that migrant camps built to house construction workers building Saudi Arabia's $1trillion NEOM ... the scheme is The Line - a 110-mile-long building which more than 9million ...