olmec civilization

UNESCO has just registered the ancient city of Tak'alik Ab'aj in Guatemala on the list of World Heritage Sites.

Despite the efforts of archaeologists and historians, the collapse of some civilizations in human history is still unknown.

Before Europeans discovered America around the XV-XVI century, there were many civilizations appeared, developed and died out on this land.

So far, some of the most mysterious archaeological findings in history have yet to find a convincing answer.

Huge rock heads scattered across the territory are one of the salient features of Olmec civilization in Central America.