World Waterpark, Indoor water park in West Edmonton Mall, Canada

World Waterpark is an indoor water park inside West Edmonton Mall in Edmonton, Alberta. It has 23 waterslides, the highest reaching 25.3 metres, and the world's largest indoor wave pool, holding 12.5 million litres. A black banner reading "CITY OF EDMONTON" hangs from the arched roof above the wave pool, near a red and white life ring.

The park opened in April 1986 as part of what was then the world's largest shopping center, bringing tropical leisure to Edmonton's cold winters. Since then, several slides have been added and renewed, though the core layout remains intact to this day.

The name reflects the ambition to bring together water park attractions from around the world under a single roof. On weekends and school holidays, families from across Alberta gather to splash together and ride the slides.

Water is kept at a steady 31 degrees Celsius (around 88 Fahrenheit), so you can swim comfortably even when January temperatures outside drop far below freezing. Life jackets are available at no charge, while larger tubes for certain slides require a rental fee.

The Blue Thunder wave pool runs on a 1,100-kilowatt (1,500 hp) hydraulic system with eight active panels across four wave bays; the four outer panels were disabled after waves threw swimmers into each other in the 1980s. Sessions last 10 minutes on and 5 minutes off, and a loud air horn warns swimmers before each one starts.