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.
They are thought to have been placed in lines along the approach to the houses of chiefs, but their exact significance remains uncertain.
Wikipedia https://en.wikipedia.org/wiki/Stone_spheres_of_Costa_Rica
World Mysteries website http://www.world-mysteries.com/sar_12.htm
Address Costa Rica
Coordinates 8°57'6.698" N -83°30'20.556" E