Ancient Celts(Galicia, Spain), Great Zimbabwe(Africa), La Quemada (Huichols Zacatecas)

I by accident ran across pictures of the dwellings of "Great Zimbabwe" of Africa and was startled.

The architecture of using stone, towers and even dwellings is almost exactly similar to te "La Quemada" of Zacatecas and the house dwellings of walls made of slabs of stone stacked on top of each other and grass for roof. That is also similar to the Ancients Celts of Galician, Spain.

Could there be a three way conection? Great Zimbabwe of Africa, Ancient Celts of Galicia, Spain and Huichols of La Quemada of Zacatecas?