Members of the group Non Nuan Xa present a show with spheres in the Palmas Sur Park of the Puntarenas province, in Costa Rica, on Saturday. The ninth Sphere Festival is celebrated from May 13 to 15 in the “canton de Osa,” to commemorate the country’s more than 300 ancient stone spheres, declared as World Heritage by the United Nations Educational, Scientific and Cultural Organization (UNESCO) in 2014.SD-Agencies