Fallsville Splash Park was a water park:See: List of waterparks (for a list of all waterparks in the world) A waterpark is an amusement park that features waterplay areas, such as water slides, splash pads, spraygrounds (water playgrounds), lazy rivers, or other recreational bathing, swimming, ...water park located in Niagara Falls, New YorkNiagara Falls is a city in Niagara County, New York, United States. As of the 2000 census, the city had a total population of 55,593. It is across the Niagara River from Niagara Falls, Ontario, both named after the famed Niagara Falls which they share. It is part of the Buffalo-Niagara Falls Metropolitan area.Niagara Falls, New York. It was adjacent to the former Niagara Falls Convention CenterNo quick definition available.Niagara Falls Convention Center.