Both places have already been surveyed by the local universities archaeology departments. Nothing was found, but they say these mounds date back a thousand years. They are still just piles of dirt.
The ‘temple’ part was never verified, as the tribes back then didn’t leave any traces. They were hunter gatherers and when the oysters were gone they moved on down the beach to Apalachicola..
It’s not unlikely that, even if artificial, their ancestors had absolutely nothing to do with its construction. More likely, their ancestors drove out or annihilated the descendants of those who did.