[custom_adv] A water park or waterpark is an amusement park that features water play areas, such as swimming pools, water slides, splash pads, spraygrounds (water playgrounds), lazy rivers, or other recreational bathing, swimming, and barefooting environments. [custom_adv] Water parks in more current states of development may also be equipped with some type of artificial surfing or bodyboarding environment such as a wave pool or FlowRider. [custom_adv] Major organizations are IAAPA (International Association of Amusement Parks and Attractions) and WWA (World Waterpark Association), which is the industry trade association. [custom_adv] Water parks have grown in popularity since their introduction in the late 1940s and early 1950s. The United States has the largest and most concentrated water park market, with over a thousand water parks and dozens of new parks opening each year. [custom_adv] Major organizations are IAAPA (International Association of Amusement Parks and Attractions) and WWA (World Waterpark Association), which is the industry trade association. [custom_adv] Water parks which emerge from spas tend to more closely resemble mountain resorts, as they become year-round destinations. For example, Splash Universe Water Park Resort, a member of the WWA, is themed to match the community in which it is located. [custom_adv] The theme is intended to enhance the community's destination appeal. Therefore, the amusement and leisure-time industry is becoming more concentrated, as winter sports are becoming common themes in summertime water recreation. [custom_adv] A process of concentration can be observed in the hybrid versions of theme-, amusement-, and water parks. Some water parks are more spa-oriented. For example, SchwabenQuellen, a member of European Waterpark Association (EWA), has no water slides; it has instead many saunas, steam rooms, "adventure showers," and relaxation-oriented water play areas. [custom_adv] An unusual feature at a water park is ice skating. Deep River Water Park in northwestern Indiana features ice skating, made possible by cooling pipes installed under their massive plaza during a recent expansion. [custom_adv] In the 2000s, an effort was made to reduce long waiting lines by introducing conveyor belts to lift passengers or use water jets. [custom_adv] There are many water parks in southern Europe where the climate suits a long season. For example, in Portugal on the Algarve there are three main parks - Aqualand, Aquashow, and Slide and Splash. [custom_adv] An unusual feature at a water park is ice skating. Deep River Water Park in northwestern Indiana features ice skating, made possible by cooling pipes installed under their massive plaza during a recent expansion. [custom_adv] There are many water parks in southern Europe where the climate suits a long season. For example, in Portugal on the Algarve there are three main parks - Aqualand, Aquashow, and Slide and Splash. [custom_adv] Success in extending the tourist season and turning water park resorts into vacation destinations has resulted in tremendous industry growth. Usually, resort hotels featuring massive indoor water parks have been reserved for overnight guests. Companies like Great Wolf Resorts/Great Wolf Lodge and Kalahari Resorts have branched out from their origin in Wisconsin Dells to open new locations around the country. [custom_adv] Success in extending the tourist season and turning water park resorts into vacation destinations has resulted in tremendous industry growth. Usually, resort hotels featuring massive indoor water parks have been reserved for overnight guests. Companies like Great Wolf Resorts/Great Wolf Lodge and Kalahari Resorts have branched out from their origin in Wisconsin Dells to open new locations around the country. [custom_adv] The largest indoor water park in the UK is Sandcastle Water Park in Blackpool, England, which opened in 1986. [custom_adv] An unusual feature at a water park is ice skating. Deep River Water Park in northwestern Indiana features ice skating, made possible by cooling pipes installed under their massive plaza during a recent expansion.