The most beautiful place in the Low country is Edisto Beach. There is a Park there with drive in sites, lots of trails, tons of beach front, and a second part on the creek. Bring your burner and pot and run out to flowers to get some fresh seafood for a great start to a low country boil.
The only bad thing about Edisto is you won't ever want to leave. I took my parents for their first time and they bought a house the next week.