The only worthwhile beach area is near Tartane on the mid-island Caravelle peninsula, where there's also a park with walking trails.
Tartane has no nearby beaches so it is to be avoided.  
mnli hypothesis: Tartane has no nearby beaches so it is to be avoided.   premise: The only worthwhile beach area is near Tartane on the mid-island Caravelle peninsula, where there's also a park with walking trails.