Hilton Head is comprised of just one island located off the coast of South Carolina. But if you take the time to explore all corners, it really feels like there are two Hilton Head Islands.
One is the public side of the island home to the main beach, a plethora of shops and restaurants, and more. The other is Sea Pines Plantation Resort- a semi-private community on the southern end of the island that is only accessible to members and those who pay the day rate to enter ($9 per car in early 2021).
These have a night-and-day difference between each other as the former is commercial and busy while the latter is quiet, nestled within the trees, and relatively devoid of commercial businesses outside of Harbor Town.
So while we could make the argument that the day rate to enter Sea Pines is worth it alone to simply take in the beauty of the island in a more peaceful environment, we would rather talk about a specific attraction you can see after entering- Sea Pines Forest Preserve.
The fee is worth it just to visit this one alone.