Mysterious stone balls in Costa Rica

In the thirties of the last century, during the cleaning of the jungle for the future of the banana plantations, employees «United Fruit Company», discovered a very strange stone balls, burrowing into the ground.

As a result, there were found more than three hundred such balls. They began to appear on the lawns of the rich estates. Some were destroyed during transportation, and some smashed avid seekers of gold inside the stone balls. While the authorities intervened in the process of assignment, dozens of balls have already been destroyed. Most of these stones, researchers found in a region called Diquis Delta. Spheres have very different sizes, from a few centimeters and ending with two-meter diameter blocks. Tentatively, the stones were carved in the sixth century BC. Archaeologists still have not put forward any adequate version goal of such areas. All the balls are under protection of the UN and UNESCO.