At around 100 meters, Tudaya Falls is the tallest waterfall within Mt. Apo National Park and one of the most impressive in Mindanao. It's located in the municipality of Santa Cruz in Davao del Sur, roughly three hours by road from Davao City.
The approach involves a trek through forest, and the falls themselves drop into a pool at the base. The surrounding area is part of the national park that protects the slopes of Mt. Apo, the Philippines' highest peak. Arrange a local guide — trails can be hard to follow and conditions vary.