Please answer quickly
What makes the stone spheres of Disquis unique?

No stone carving tools have been discovered near the stones, so the Spheres must have been expertly carved in other locations in Costa Rica. Even stranger, more spheres made of the same materials have been unearthed on the Costa Rica island of Isla del Cano, an island some 20 kilometers west of the Southern Pacific coast. For those visitors on a vacation in Costa Rica who want to see these strange Disquis Spheres, quite a few of these pre Colombian stone artifacts are on display at the Museo Nacional in San Jose, although many are on display nearer their home in the Diquis Delta on the Southern Pacific coast, such as Bahia Drake or the Palma Sur area. Some common, fanciful legends attached to the Disquis Stone Spheres of Costa Rica is that they are evidence of the sunken city of Atlantis, or that they are artifacts left behind from ancient space traveling aliens. More academic theories claim that they may have been used as road markers, been ammunition in catapults, or served to mark the pathway for spirits journeying to the afterlife.

In any event, these mysterious stone spheres are unique to Costa Rica and the indigenous people who lived in the Disquis Delta. Visiting the Disquis Stone Spheres may add a little magic and imagination to your vacation in Costa Rica. At least 300 Diquis Spheres have been reported discovered since the 1930’s, and it is safe to say that even more have been destroyed or remain unfound.

give me 3 of youre vocab words