When it comes to land based casinos, the USA has their fair share of grand establishments. Even outside of Las Vegas, the number of land based casinos in the states is staggering. This also includes riverboat casinos. Riverboat casinos became popular in many states when strict gambling laws forbad the construction of permanent land based casinos in the area. Today there are many luxurious riverboat casinos scattered all over the county. For anyone visiting Missouri, the Hollywood Casino St. Louis might be worth a visit. This large riverboat casino complex houses a 24 hour casino, a luxury hotel, a selection of restaurants, a live event theatre as well as a nightclub.