Saudi Arabia has embarked on a massive project to build one of the world's mega cultural, sports and entertainment cities in Al-Qiddiya, southwest of Riyadh.  It will have modern recreational facilities including a safari and a Six Flags theme park.  Work on the multibillion riyal project will start next year and its first phase will be opened to the public in 2022. US-based Six Flags announced in June that it had begun talks with the Saudi government to build theme parks as part of Saudi Arabia's Vision 2030 efforts to expand its entertainment sector and diversify the economy.  Chief executive Jim Reid-Anderson said later in the year that the company would build three parks in Saudi Arabia, with each costing between $300 million and $500 million.  The government wants people to have more fun at home and take fewer vacations abroad.