These images of Riverside Waterslide (below) were shot in August 2010 on an iPhone.
The water park had already been closed for several years at this point. The grass and trees had become overgrown and the hope of saving it had largely began to fade. While the park had obviously experienced some vandalism, it's clear that Riverside Waterslide was already in rough condition when it closed given the number of patches on the slides, the rotten wood, and the badly faded paint throughout every section of the park.
These casual snapshots (shared with permission from the photographer who asked to remain anonymous) are a rare glimpse inside Riverside Waterslide during the few short years it sat completely abandoned. Only a year or two after this, the site had been completely cleared and Riverside Waterslide was officially no more.
See the full photo essay here.