There is an agency offering very exciting "river climbing" tours along the Kawasan waterfalls outside Moalboal.
It's called Planet Action and is located in Moalboal.
For the river climbing tour you should be quite fit and adventurous because it's rather exhausting and slippery - be careful.
Don't take things with you which shouldn't get wet - you will!
They also offer a lot of other action tours (also on Negros) like canyoning, trekking, mountain biking, moto cross, horse riding, caving...
It was a lot of fun to do a horse riding excursion through the Cebu jungle. The horses were quite small, but very fast and in a good mood... They didn't have "normal" horse riding equipment, so we sat on old rice sacks bent around the horses back... But it was quite ok and (almost) nobody went down...
amazing waterfalls near Badian / Moalboal in very beautiufl landscape
refreshing to take a bath in it..or take a good massage with the bamboo floating