The Stone of Twelve Angles, the Inca Palace of Hatunrumiyoc, Cuzco, Peru"The stone is in the Lienzo petreo wall, it is an excellent exaple of the Inca's skill with polygonal masonry"

St. Pablo Church and its Mudejar Steeple, San Pablo quarter, Saragossa (Zaragoza), Aragon, Spain, Europe

Walls and towers at night of the Aljaferia Palace, dating from the 11th century, Saragossa (Zaragoza), Aragon, Spain, Europe

The Polygonal wall, a retaining wall built after the destruction of the old temple of Apollo in 548 BC, Delphi, UNESCO World Heritage Site, Peloponnese, Greece, Europe

The Polygonal wall, a retaining wall built after the destruction of the old temple of Apollo in 548 BC, Delphi, UNESCO World Heritage Site, Peloponnese, Greece, Europe

Polygonal towers of the Grand Synagogue, Budapest, Hungary, Europe

The Polygonal wall, a retaining wall built after the destruction of the old temple of Apollo in 548 BC, Delphi, UNESCO World Heritage Site, Peloponnese, Greece, Europe

Sinkhole Plain, polygonal doline karst, near Mammoth Cave, Kentucky, United States of America, North America

Orford Castle with its unique polygonal tower keep, dating from the 12th century, Orford, Suffolk, England, United Kingdom, Europe

The Polygonal wall, a retaining wall built after the destruction of the old temple of Apollo in 548 BC, Delphi, UNESCO World Heritage Site, Peloponnese, Greece, Europe

A two-storey polygonal Coburg oriel on the Stadthaus building, Renaissance building, built from 1597 to 1601, seen from below, market square, Coburg, Upper Franconia, Bavaria, Germany, Europe