There is a nice walk to a lookout and one of the many catholic monuments that characterise French territories in the Pacific. At low tide you can walk across a sandbar over to Nukuatea for a look around that island as well.
Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails.