This is a fascinating sister site to Brookgreen Gardens - the land for both was owned by the same family.
The house at HBSP is worth the tour, there is a nominal fee and you can upgrade to an audio tour for another couple of bucks.
I highly recommend that you take the time to go out to the beach and enjoy this great unspoiled spot. If the weather is conducive, take your swimsuit and a chair and just relax.
There is a fee to get into the park, I think it was $5 per person if you don't have a pass or membership.
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