I wanted let people know what a positive and negative exp. that our group had at the 27 Waterfalls. What a great place to visit and explore. We (4ppl) two adults and 2 teenagers hired a guide named Billy. Billy at first was polite and cheerful with all of us. We only did the first 7 waterfalls but, enjoyed it very much. At one point I heard Billy refer to my son (who has Aspbergers Syndrome a form of Autisim) as "Loco" to another guide. I had explained to Billy before the trip that he had Autismo Especial. This explainanation had worked well in the past with many other wonderful Dominicans. I let it slide because my son speaks no Spanish. When we returned to the staging area we tipped Billy the equal of 8 U.S. dollars in Peso's. This worked out to be roughly 23% or more of the trip price. He had the gall to come up to us and say "Whats this? Whats This? I was taken aback at his rude behavior. I explained that I had felt it was enough and only had large U.S bills. He told me that I should go get change. He also pointed to some big Dominican guy who was staring at us and said "he is not happy" Having worked in the Justice System in the U.S. I was not too intimidated by this cheap behavior. Billy gave the attempt up after a few seconds with "No Problemo". What really bothered me after we left is that my girlfriends daughter told us on the way back to our hotel that Billy had made open physical advances on her despite being told that she was engaged and was not interested several times. She said that he had grabbed her tried to hug her, hold her hand, told her he liked her white skin and tried to touch her numerous times and pulled cheap crap like, if you do not sleep with me you are racist against Dom. Men. He also told her at the very last "do not tell your Momma cause she would be mad". I WISH I had known this before we left the site. Although I wanted to go back, the girls did not want too at all. They wanted to avoid any confrontation. Has anyone else had a negative exp. like this? Any suggestion's?