Giant stone balls unearthed in Costa Rica.

Recently, archaeologists unearthed giant stone spheres in the Diquís plain of Costa Rica.

On the small island of Isla del Caño and the Diquís River Delta more than 300 stone spheres have been discovered. These spheres were identified as belonging to the Diquís culture. Much debate has raged around whether this rock is man-made or a product of nature.

Find the stone balls

The Diquís culture emerged in the Valley of the Rio Grande de Térraba, where they established complex social, economic, and political systems to govern their society.


During the Chiriquí Period between AD 800 – 1500, many settlements grew into large communities around the alluvial lands of the Térraba River and its main tributaries, constructing large structures using round-edged boulders, paved areas, burial sites, and circular or rectangular mounds with stone walls.

The Diquís reached the pinnacle of cultural development during the Chiriquí period from AD 800 – 1500. Diquís artisans created exquisite pottery, bone and gold objects, and sculpted stone spheres in important areas of the settlements. Stone spheres were also lined up in public squares, or along the walkways to the residences of chiefs or ruling elites. These stone balls symbolize the power, the bravery of the ruler.

The Diquís Civilization

These stone balls represent an ancient advanced civilization.

The question is: How to make these stone balls when ancient technology has not yet advanced? How to transport it to the location?


Over time as well as being buried under the rock layer, the stone balls are not as intact as before. the rock spheres have deteriorated due to changes resulting from the composition of the rock, damage caused by moisture, and flooding from hurricanes and tropical storms.

Isabel Medina-González from ENCRyM-INAH said: “The intervention included surface cleaning and stabilisation through the application of edging and patches of enriched lime-sand mortar to slightly increase the hardness, as well as the placement of protective layers with mortar “.


And besides the symbolic meaning of power, do these stones have any other meaning? Archaeologists are still on the way to find the answer.

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