Last year, Macau generated $38 billion in casino revenue, six times more than Las Vegas, Nevada. Gambling has been legal in Macau for more than 150 years but has seen a rapid transformation over the last decade from the small time gambling clubs, gangs and prostitution of the 1990s, to becoming the worlds gambling mecca. Macau, the only place in China with legalized casino gambling is booming. MACAU - JULY 29: Tourists take a ride on a gondola up the man-made canal inside the Venetian Casino.