Someone in the Diquis Delta of Costa Rica had a big love of giant balls a few thousand years ago. There are hundreds of granite spheres in the area, some as bis as two meters in diameter. The largest examples weigh over fifteen tons.
We know from their placement that they were often arranged outside the homes of important tribal chiefs. What we don't know is why, or how they were created in the first place. Many of the modern-day locals have taken to using them as ornamental garden decorations!