You need to head north and follow the signs to Bann Makok (as the waterfall is only signposted here and there) and take a right turn to the parking lot.
If you reach the dirt turnoff to the left that leads to Bann Makok you have gone too far.
Once at the car park it's down a steep set of stairs you go -- they're now well sized but if wet, watch your footing very carefully. Once at the base, head out onto the wooden platform then scamper over the boulders to reach the falls.
When we visited the waterfall was slight, but the pool was deep. We were the only ones there and it was very serene. It's worth the hassle to reach. Continue onwards to Bann Makok afterwards for a refreshing drink.