Really miss going here, it was a great facility and so busy on a weekend, I never understood why they closed it (from what I understood it didn't make much money) but you couldn't move for people! Such a shame. Replaced with York Community Stadium. Here's some pics during demolition: https://www.yorkmix.com/news/splashdown-york-waterworld-is-reduced-to-rubble-24-pictures/
Late to the party, but fantastic pics and explore. I saw the recent Wet n Wild waterpark explore doing the rounds on Facebook and that prompted me to search for more waterparks in here.