Kirsten, I believe you are talking about water canyoning, sort of climbing to head of waterfalls and descending by line and harness This is the first time I have noticed it mentioned relating to the D.R. I do know you will not get this activity near Punta Cana. You may be able to arrange a tour from there to bring you and your group to other parts of the country, the mountains. I do not know for sure, it may require a guide and permit for public lands. I'll bet one of the other regular posters may have some more feedback regarding this. Regards, PJT