Earth’s enigmatic geometry and energetic heritage Overview In the Bosnian town of Zavidovići, east of Visoko, lies one of the world’s most mysterious natural–cultural phenomena: the giant stone spheres—perfect or near-perfect balls formed in granite, sandstone, and conglomerate. Some weigh several tons and measure up to two meters in diameter. Scattered through forests, river valleys, and soil layers, they form one of the largest known concentrations of spherical stones in th
