When you think of a casino, bright lights and big money are likely the first things that come to mind. From the glitzy bling of Las Vegas and Atlantic City to tiny mountain towns where residents gather in 19th century Wild West buildings to play poker, gamble on slots or throw dice, casinos are a huge draw for people who want to test their luck and maybe walk away with a little extra cash in their pockets.

In the United States, where casinos are legal, about 51 million people visited a casino in 2002. This includes tourists who took weekend bus trips to Vegas and the countless Americans who play the online versions of these gambling halls. Casinos are a major source of income for many cities and towns, and they boost local economies in other ways too. The casinos themselves generate jobs, and the money spent by gamblers will eventually be re-invested in restaurants, hotels and other businesses.

While some casinos may still have the seamy image associated with organized crime, legitimate businessmen and investors now control most of them. Casinos have also increased their use of technology in order to improve the security of players. Video cameras monitor games and betting areas, and electronic systems can track chips on tables or spin roulette wheels minute by minute to discover any statistical deviations.

While it’s hard to determine the world’s most famous casino, the Bellagio in Las Vegas certainly gets plenty of recognition. Its fountain show, luxurious accommodations and high-end dining options are just a few of the things that make it a top destination for tourists.