A casino, also known as a gambling house or gaming hall, is a place where people can gamble and play games of chance. Modern casinos often combine gambling with other attractions such as restaurants, hotels, retail shops, and even spas.

A popular destination for both casual and high-stakes gamblers, casinos have become an integral part of the tourism industry around the world. The Bellagio in Las Vegas is perhaps the most famous casino, thanks to its dancing fountains and high-end shopping options, but there are plenty more, from the flashy casinos in Macau, China to the smaller Native American casinos across the United States.

Regardless of their size or location, most casinos share similar features. These include:

While the casino is a place where people can play games of chance, it is not without risk. The large amounts of money handled within a casino can create a temptation for patrons to cheat or steal, either in collusion with each other or independently from the staff. To counter this, most casinos have strict security measures. They also use bright and sometimes gaudy decor to stimulate the senses and make it easy for players to lose track of time. Many casinos use the color red because it is believed to be an effective stimulant. In the 1990s, casinos increasingly used technology to monitor and control games. For example, betting chips have built-in microcircuitry that allows the casino to monitor the amount wagered minute by minute and quickly discover any anomalies; roulette wheels are regularly monitored electronically to detect any deviation from their expected value.