From World Waterpark
"This tropical paradise boasts the world's largest indoor wave pool and more than 21 unique waterslides and play features."

World Waterpark is a water park located within the West Edmonton Mall in Edmonton, Alberta, Canada. Opened to the public in 1986, it is the second largest indoor water park in North America, after American Dream's DreamWorks Water Park which opened on October 1, 2020. Wikipedia