Swimming at Ditumabo Mother Falls is a must do activity in sun-shiney Baler. You would need to trek around 30 to 40 minutes on the foot of the mountain to see the Mother Falls. The falls isn't called 'mother' for no reason— it is one of the the biggest and majestic waterfalls in the area. Fresh water falls from the mountain and the breeze is really cold. This is a sure shot at being one with nature.
Note: don't worry about bringing in food for the trek. Surprisingly there are small food stalls that you will see along the way to the falls.