Pops wrote:
Ojos de Agua has added a zip line.  Place is always crowded.  Good viewing of young Ticas.  Pools are spring fed, therefore clean, but the water is cold.
ojo de agua is looking better -used to be a shithole.
there's another water park in heredia called waterland-very similar to ojo de agua.
http://www.waterlandcr.com/the one i like is la campiña country club is not exactly a waterpark
but the have swimming pools, sauna. bbq's area, tennis court and much more.  oh I forgot...( is a country club  

 )
http://www.lacampinacountryclub.com/ 
Waterland is cool, I dont know the CC though... but I generally don't like the snootiness of CC's in general....