A former student of mine shares a Facebook post of local historical interest:

The Georgia Photography Fanatic.
The accompanying text:
Ten miles north of Dahlonega, GA, at the intersection of US 19 and State Road 60, you’ll come up to a roundabout with something odd in the middle: a big stone pile inside a triangle! It’s known as the Stone Pile Gap & it has quite a history!
The historical marker reads:
“This pile of stones marks the grave of a Cherokee princess, Trahlyta. According to legend her tribe, living on Cedar Mountain north of here knew the secret of the magic springs of eternal youth from the Witch of Cedar Mountain.
Trahlyta, kidnapped by a rejected suitor, Wahsega, was taken far away and lost her beauty. As she was dying, Wahsega promised to bury her here near her home and the magic springs. Custom arose among the Indians and later the Whites to drop stones, one for each passerby, on her grave for good fortune. The magic springs, now known as Porter Springs, lie 4 miles northeast of here.”
According to lore, the Georgia Department of Transportation has tried to remove the stones on more than one occasion during road construction. Supposedly each time it happened, at least one person died in accidents while moving the pile, leading many to believe that removing a stone from the pile will bring the curse of the witch of Cedar Mountain upon the thief, so only recently they decided to do the next best thing; build a roundabout around the stone pile!

The Georgia Photography Fanatic.
The historical marker is quoted accurately (although according to the GHS website the maker is currently “down”):

Georgia Historical Society.
Of course I would need to do more research on this question before coming up with a definitive answer (who exactly were these people who died?), but my hunch is that this entire thing – both the original story and the story of the subsequently immovable pile – is B.S. If nothing else, the Cherokee did not have “princesses,” and any story that refers to one should be taken with a grain of salt.