Water park is an amusement park that features water play areas, such as water slides, splash pads, spraygrounds (water playgrounds), lazy rivers, or other recreational bathing, swimming, and barefooting environments. Water parks in more current states of development may also be equipped with Some type of artificial surfing or body boarding environment such as a wave pool or Flow Rider. Waterparks have grown in popularity since their introduction in the late 1940s and early 1950s. The United States has the largest and most concentrated waterpark market, with over a thousand waterparks and dozens of new parks opening each year. Therefore, the amusement and leisure time industry is becoming more concentrated and becoming commonplace themes in summertime water rides. Water play areas are similar to waterparks and include urban beaches, splash pads, and smaller collections of waterslides in many hotels and public pools.