The archaeological record sometimes throws up oddities that can’t easily be explained. From giant statues on Easter Island to the pyramids of ancient Egypt, these discoveries have often raised the question – ‘How could these possibly have been made by humans so long ago?’ The stone spheres of Costa Rica are definitely one of these mysteries.
The stones were originally located across the Diquis Delta and on the Isla del Caño in Costa Rica. They were uncovered during the 1930’s when the United Fruit Company started searching for new areas to cultivate their banana trees. It’s estimated that there were around 300 petrospheres that varied in size from a few centimetres to over two meters in diameter. Many of these have subsequently be relocated.
The largest petrospheres weigh around 15 tons and are classed as megaliths in their own right. Most of the stone spheres are made from a hard igneous rock known as granodiorite (Gabbro) although some have been shaped from both sandstone and limestone. Very few now remain in their original locations as most have been moved to private estates, museums and government buildings.