I called IMDB to the rescue. The filming location is: Turtle Bay, O'ahu, Hawaii, USA
The photo you have uploaded can be bought It appears to be Green Island in Australia.
I did find the location of island mentioned in the question through google image search. To this relatively new feature of google search enables to locate a picture. This can be done by dragging any picture to the search field of google (which then changes in a dropbox). This picture itself is then the "keyword".
The approach is not water tight, but in this case it was possible to identify green island.