This one's in bang pae waterfall's grounds and you'll pass it and hear gibbons hooting as you make your climb to the waterfall.Must commend the team there for putting in so much love and effort to give these gibbons a chance. You'll see some gibbons with physical injuries coz they used to be bullied by their owners and you'll hear some of their sad stories. Pretty sure they're much happier where they are now.