water park
An indoor or outdoor place devoted to water play, with equipment such as slides, wave pools, or splash pads.
A waterpark is an indoor or outdoor place devoted to water play, with equipment like water slides, wave pools, splash pads, and spraygrounds.
The attraction can be indoors or outdoors. No particular combination of slides and pools is required.
The equipment supports water play. A body of water without that dedicated recreational use does not become a water park merely because people can enter it.
