A team from the National Institute of Anthropology and History, and the National School of Conservation, Restoration and Museography, have undertaken a project to conserve Costa Rica’s stone spheres.

Over 300 stone Petrospheres, often referred to as the Diquís Spheres, have been found on the small island of Isla del Caño and the Diquís Delta in Costa Rica.

The spheres are attributed to the now extinct Diquís culture, a people that first emerged in the Valley of the Rio Grande de Térraba during the Synancra period around 1,500 to 300 BC.