Waterworld.
But if you want a real version of it, that's better than the directors cut. The 'director' of which was kevin Costner who bought the rights to it and cut loads of shit out. (He was not the origional director)
You need to do a torrent search, it is the only way as there is no 'official' full lengh version, and look for 'Waterworld The Ulysses Cut' a version of which I have added to Demonoid.
I understand it is not perhaps normally acceptable to write this kind of thing on here but for this film it really does deserve an exception.
The Ulysses Cut is a fan made cut and a lot of time and effort has gone into it