L'Anse aux Meadows, Newfoundland Canada, is the only authenticated site of Norse settlement in North America and is the first cultural site in the world to be inscribed upon the UNESCO World Heritage List.
From this site, the Norse first encountered aboriginal North Americans.
When humans migrated out of Africa, some went East, eventually migrating across Asia and crossing over to North America (via the land bridge between what is now Russia and Alaska, or via water).
Some went west, eventually making it all the way to Europe and then to Iceland.
These Vikings then crossed to L'Anse aux Meadows and were the first people from the west to encounter the people from the east.
Completing the circle.