One of James Oglethorpe's most trusted colonists was Noble Jones. And as such, he was given the first large estate of land in the new colony - four hundred acres on the Skidaway narrows.
This was partly for his service to the colony, but more importantly, it was for Jones to establish a lookout for any Spanish incursion or invasion. So, he built a fort like house on the narrows.
Since there are no natural stones on the low country coast, the first mason product made was a concrete called tabby. The understanding of how to make tabby was brought over by the first slaves known as the Gullah. Their ancestors learned it generations before from the Romans. Tabby is an equal parts mixture of sand, fresh water, oyster shells and limestone (gotten by baking oyster shells down to a chalky powder.)
Thus, Jones built his structure out of tabby. Today, its remains are perhaps the oldest tabby building in Georgia - the Horton House on Jekyll Island being its main rival.
While almost everyone that visits Wormsloe goes to see the mile and half long oak lined drive, it's the remains of Noble Jones' house I like the most.