Balls of wool with bark and herbs as natural dye, Chinchero, Sacred Valley, Peru

Blackforestline suspension bridge, Todtnau, Schwarzwald (Black Forest), Baden-Wurttemberg, Germany, Europe

Blue balls of wool and dried plant as natural dye, Chinchero, Sacred Valley, Urubamba Province, Cusco (Cuzco) Region, Peru, South America

Brown balls of wool and dried leaves as natural dye, Chinchero, Sacred Valley, Urubamba Province, Cusco (Cuzco) Region, Peru, South America

Red balls of wool and cactus insects as natural dye, Chinchero, Sacred Valley, Urubamba Province, Cusco (Cuzco) Region, Peru, South America

Torysh (The Valley of Balls), Shetpe, Mangystau, Kazakhstan, Central Asia, Asia

Giant rock carved in half, Torysh (The Valley of Balls), Shetpe, Mangystau, Kazakhstan, Central Asia, Asia

Woman standing in the Torysh (The Valley of Balls), Shetpe, Mangystau, Kazakhstan, Central Asia, Asia

Aerial of Torysh (The Valley of Balls), Shetpe, Mangystau, Kazakhstan, Central Asia, Asia

Balls of stone, Torysh (The Valley of Balls), Shetpe, Mangystau, Kazakhstan, Central Asia, Asia

Balls of naturally dyed wool, Chinchero, Sacred Valley, Cusco, Peru, South America

Aerial of Torysh (The Valley of Balls), Shetpe, Mangystau, Kazakhstan, Central Asia, Asia

Balls of stone, Torysh (The Valley of Balls), Shetpe, Mangystau, Kazakhstan, Central Asia, Asia

Balls of naturally dyed wool, Chinchero, Sacred Valley, Cusco, Peru, South America

In the 13th century, the golden age of the mongol empire, a sport resembling polo became a training game for the mongolian cavalry throughout high asia. horsemen learned to bend low at speed, like acrobats to finish off fallen enemies with sabres, looting their prey on the ground by scooping up jewels that caught their eye. there are stories, too, of genghis khan knocking about an enemys head as if it were a ball. orkhon valley, central mongolia

Gas tank in the shape of a ball, Rhine Herne Canal, Ruhr, Ruhr Valley, Northrhine Westphalia, Germany

Gas tank in the shape of a ball, Rhine Herne Canal, Ruhr Valley, Ruhr, Northrhine Westphalia, Germany

Annasaeule by Christof Benedetti, at top a statue of Pope Vigilius, 2008 UEFA European Football Championship, Maria Theresien Street, Innsbruck, Tyrol, Austria, Europe

Dung Beetle (Scarabaeinae), adult on dung ball, Starr County, Rio Grande Valley, South Texas, USA