Researcher Semir Osmanagic from Bosnia is an expert on the so-called "Bosnian pyramid". He and some other researchers are sure that on the territory of Bosnia there is an ancient structure in the shape of a pyramid, this is Mount Visočica near the city of Visoko.
But now we are not talking about the pyramids, but about another unusual phenomenon, also located near the city of Visoko. Several stone spheres were found in the town of Zavidovichi. According to Osmanagich, all of them are of artificial origin, associated with the "pyramid" and are also artifacts of an unknown civilization that lived in these places more than 1500 years ago.
The largest ball was recently partially excavated in the Podubravlje forest, not far from Zavidovichi, it is as tall as a man and has a radius of 1.2-1.5 meters. Osmanagich calls it the oldest (the stone has a high iron content) and the largest stone ball in the world. Its weight is supposedly 30 tons.
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According to Osmanagic, he has been studying balls for 15 years, traveled all over the world and saw similar stone spheres in Costa Rica, Turkey, Easter Island, Mexico, Tunisia, the Canary Islands, and also heard about stone spheres in Russia, USA, Egypt and other countries.
Official science calls such balls nodules and considers them a natural phenomenon.