When many people think of a casino, they picture one of the megaresorts in Las Vegas–an entertainment complex gleaming with neon lights, fun, and games. But, in actuality, casinos are smaller and often less glamorous than this image suggests. Some are also attached to hotels and other types of lodging, or are found aboard cruise ships and in some other locations.

Most modern casinos feature sophisticated security measures in addition to their games of chance. Typically, these include a physical security force and a specialized surveillance department (sometimes called the eye in the sky). Security personnel patrol the casino floor and respond to calls for assistance or reports of suspicious or definite criminal activity. In addition, some casinos have catwalks in the ceiling above the gambling area that allow surveillance personnel to look down, through one-way glass, on patrons at table games and slot machines.

Casinos are in business to make money, and the successful ones rake in billions each year for the companies, investors, and Native American tribes that own them. In addition, state and local governments collect taxes and fees from casino profits.

Some casinos are known for their elegance, like the legendary casino at Monte-Carlo. This casino, which opened in 1863, was once a playground for Europe’s royalty and aristocracy, who came to gamble and to enjoy the town’s luxurious accommodations and spectacular scenery. Today, the Monte-Carlo is still a favorite destination for wealthy visitors from around the world.