During the 1940s in Costa Rica, workers for the United Food Company were clearing the jungle to establish a banana plantation when they discovered hundreds of circular stone spheres weighing up to 16 tons.
Located near the Pacific Ocean in western Costa Rica, many of the stone spheres were only a few inches in diameter while others were as round as seven feet in diameter.
For an unknown number of centuries, the mysterious stones, some that are perfectly round and surprisingly smooth, have remained in the Diquis Valley while some have been moved to various locations.
The smooth and symmetrical stones are believed to date back as far as 1500 to 300 BC when the Diquis culture created them by unknown methods that ceased to exist by 1570 AD.
Scientists believe that the Diquis culture was wiped out by Spanish diseases, and the round stone objects were eventually hidden by the jungle’s overgrowth till they were rediscovered in the 1930s and 1940s.
From the small, smooth stones in nearly perfect diameters to the hugest circular stones weighing as much as 32 thousand pounds, scientists remain baffled concerning why and how the circular stones were created.