I guess sipping a cold one while sat in a 105 degree farenhiet pool right underneath an active volcano might rank up there. Add in the waterpark element, happy children, relaxed wife and you are starting to experience the pleasure a day in Kalambu can bring.
An added bonus was that because it was my birthday we all got in half price! The lovely lady charged us the Nationals rate as a gesture of good will, though we do suspect that the lack of punters may have worked in our favour.
We spent the day between high octane adrenaline slides like the Mammut and relaxing under geo thermal waterfalls. Of course we interspersed this with a beer or two, just to cool down. All in, including lunch it was 44,000 colones for us all, exactly half the quoted website price had we pre-booked.