Early records name some such places. "Brick Rowe" is mentioned in early Jamestown records, for example, but this could be a site in New Jersey or North Carolina for all anyone knows. Then there are the mysterious Wallonian settlers who built the Wall from which Wall Street gets its name. Although it's claimed that the wall was built under the Dutch, it seems to have been there before Manhattan was first sold. So, who were those people and why were they there? No European source informs us.
Thanks Mu, you are very knowledgeable and interesting. There's also the wall at Rockwall Texas. I believe I have read where there is a possibility that ancient Phoenicians may have been responsible. The whole history of North and South America is not what we were taught in school, imho. In fact, some Melungeons also claim Phoenician ancestry. In fact, if you think about it, Vikings were probably more likely to bring slaves on the boats with them, or the people they had picked up along the way. Thanks again