Bali is very famous by Adventure Activities!
Two of the most adventure activities in Bali are:- Bali White Water Rafting
- Bali Safari and Marine Park
Ayung River with rapids level 1-2 with scenic river view at Ubud Area.
Telaga Waja River rapids 2-3 with wild river at slope of Mount Agung, the highest mountain in Bali.
The best company who's provide white water rafting are;
If you want to book compare the price and not book directly to rafting company, because you can get much cheaper at Travel Agency like Bali Trip Service with exactly same inclusion.
For Bali Safari and Marine Park, I recommended to you to check and compare the price also, is still Bali Trip Service is the cheapest one. I am not lire, proof it by visit their site.