HIT SALWA ROAD, moving towards BU SAMARA,KSA..pass out new flyover/interchange after AIN KHALID R/O.
Then keep driving straight towards Bu Samara for a minimum of 12-15 kms from Ain Khalid R/O.
You would come acroos ABU NAKHLA PETROL STATION and after another 2 kms on right hand side you would see EXIT 29. TAKE EXIT 29, go left and reach a R/O, go straight and then left at T JUNCTION, you would reach Aqua park after 400mtrs on right side.
Cheers