Originally built for the World Youth Games, the listing of its proposed facilities proves that they spared no expense, nor any fucks given for the finished product. The water park was supposed to house a 12-story glass roof, three underground floors, an additional nine floors above ground, five swimming pools complete with water slides, and a track and field (water ... field?).
Trash aside, it still has less pee in it than your average water park.
It was also supposed to house something called the "Palace of Sports," which was a hotel for visiting athletes that itself contained offices, cafes, and a center for physical therapy and medicine. Now it's just a hell of a place to shoot zombies. Seriously, hole up on that diving board; those steep stairs are a great place to bottleneck and ... ahem, we're getting carried away here.
And if you're cornered, just dive headfirst into bare concrete.