Dark side of Saudi Arabia: It's filled with luxury hotels, set to host a World Cup and home to some of the biggest names in sport. But from agonising deaths to women thrown in jail, workers reveal truth behind the glamour ⊕

It's been four years since Saudi Arabia 's ruler, Crown Prince Mohammed Bin Salman, unveiled plans to build a mega metropolis. But work has stalled, and the project is drenched in controversy.