Stone Spheres in Costa Rica
If you travel to the Diquis Delta of southern Costa Rica, you’ll find these giant stone spheres, also known as Las Bolas (“The Balls”). With some dating back as far as A.D. 600, they were created by people in the Pre-Colombian times. Most are crafted from a rock made of hardened molten magma called gabbro, and they carved this rock into perfectly round spheres, likely using other small stones, according to recent findings.
Many people have tried to come up with an explanation for them. Some people think it was some sort of astronomical tool, but others believe it may have been an arrow that pointed to something. However, no one really knows what they were designed for. The people that once lived in Costa Rica and Central America, called the Chibchan, as well as the information about the spheres disappeared following the Spanish conquest.