I live in Vanuatu and is it very far to the west side of the Pacific yet the almost southern most island of Vanuatu, Aneityum, has stories of what they called the "Yellow People" that were on the island before they, Melanesians, arrived from northern islands. These people on the island were excellent stone carvers and could make stone walls which the current locals admit they never learned from the "yellow people". Old engravings exist still of these original people that to me sound like those may have come from the east, South America. I don't have photos though, this is a story I just heard recently from family members of that island.