Borderlands is a riverside activities camp offering kayaking, rafting, biking, hiking and more, and it's run by a fun-loving, young and international crowd. Accommodation is basic but quite pricey, in either screened open-sided cabanas or large tents with beds. There's a separate bathroom block and a cool terrace/dining area. Be warned that school groups can swamp the place from time to time.
Packages including full board and two activities cost US$125 per person.