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Perfectly round boulders Costa Rica
At the beginning of the last century, during the clearing of the jungle for banana plantation workers of the company «United Fruit Company» discovered more than three hundred of strange mysterious perfectly round stone balls. Scientists have not been able to put forward any coherent theory of the origin of those boulders. It is only known that the stones are carved in the sixth century BC. At the time, treasure seekers smashed more than one ball in search of gold. Now all the balls are under protection of the UN and UNESCO.
