The location here is the Museo Nacional de Costa Rica where one of the stone spheres is displayed.

Stone spheres of Costa Rica

The stone spheres (or stone balls) of Costa Rica are an assortment of over three hundred petrospheres in Costa Rica, located on the Diquís Delta and on Isla del Caño. Locally, they are known as Las Bolas. The spheres are commonly attributed to the extinct Diquís culture and are sometimes referred to as the Diquís Spheres. They are the best-known stone sculptures of the Isthmo-Colombian area.

• http://en.wikipedia.org/wiki/Stone spheres of Costa Rica