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Photo: Axxis10, CC BY-SA 3.0 via Wikimedia Commons
These mysterious stone spheres in pre-columbian chiefdom settlements made by unknown people have been discovered in the Valle de Diquis area around Sierpe. The settlements with the spheres are a UNESCO World Heritage site. See them first-hand to develop your own theory about their history. The site is located between Palmar Norte and Sierpe at place called Finca 6.
The stone spheres of Costa Rica are an assortment of over 300 petrospheres in Costa Rica, on the Diquís Delta and on Isla del Caño. Locally, they are also known as bolas de piedra. The spheres are commonly attributed to the extinct Diquís culture, and they are sometimes referred to as the Diquís spheres. They are the best-known stone sculptures of the Isthmo-Colombian area.