Ranked first in the world’s four major casinos, the oldest casino in the United States. Las Vegas, Nevada is one where the heat is scorching and the sparse desert vegetation, the state government financial constraints, it gambling legislation. Gambling industry to make this desert town extra cash and prosperity. Las Vegas casino hotel building is a symbol. Than a such a luxurious building, a more than a strange strange. Such as the Mirage Hotel Casino entrance, there is a huge active volcano model, automatic spraying every 15 minutes, once burst, emitting flames of fire, to become a major spectacle casino.