Since the 1940s, archeologists have been unearthing mysterious stone spheres in the Diquis Delta of Costa Rica. Initially discovered during agricultural forays undertaken by the United Fruit Company, these objects range in size from a few centimeters to over two meters in diameter with some weighing as much as 16 tons. All of the spheres are man-made objects formed from the igneous stone known as granodiorite.
Although many of the structures have been transported to various high profile locations in Costa Rica or are owned privately, their origin in the Diquis Valley remains unexplained.
