Saudi Arabia has unveiled plans for an entertainment city on the edge of Riyadh which will be 50 times the size of Gibraltar once completed. The 334-sq km attraction – about the same as Las Vegas – will offer cultural, sporting and entertainment activities – including a Six Flags park and a safari park. The announcement boasts it will be the first of its kind in the world. Building will begin early next year and the first stage would finished by 2022. <br/><br/>Vision 2030, announced by Deputy Crown Prince Mohammad Bin Salman a year ago, aims to diversify the economy and reduce the kingdom's reliance on oil, through a series of projects. The entertainment city – about a fifth of the area of Riyadh in size – is the latest to be announced.