The stone spheres of Costa Rica also known as the Diquís spheres are a collection of approximately 300 petrospheres found in the Diquís Delta and on Isla del Caño in Costa Rica These spheres are notable for their nearly perfect roundness and their precise crafting which is quite remarkable considering they were created over a thousand years ago. The spheres range in size from a few centimeters to over 2 meters in diameter and they are made from a variety of rock types including granodiorite gabbro and limestone The exact purpose of the spheres and the methods by which they were created are still a subject of debate among archaeologists and historians. The spheres are believed to have been created by the indigenous people of Costa Rica such as the Diquís culture who inhabited the region between 300 BC and 1550 AD While their exact purpose remains unknown it is widely speculated that they may have had ceremonial or astronomical significance or served as status symbols for the elite members of the society. The stone spheres of Costa Rica were declared a UNESCO World Heritage Site in 2014 due to their cultural significance and mysterious origins They continue to be a subject of fascination for archaeologists historians and tourists alike and they have become an iconic symbol of Costa Ricas preColumbian heritag.