Giant's Causeway, County Antrim, Northern Ireland, UK, Europe

Giant's Causeway, County Antrim, Northern Ireland, UK, Europe

The octagonal Sher Mandal tower within the Purana Qila in Delhi, India, Asia

Octagonal Yumedono hall in east precinct of Horyu-ji Horyuji Temple, Nara, UNESCO World Heritage Site, Japan, Asia

Robert Burns memorial on the Octagon, Dunedin, Otago, South Island, New Zealand, Pacific

Dome fresco of The Last Judgement by Giorgio Vasari and Federico Zuccari inside the Duomo, Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

Dome fresco of The Last Judgement by Giorgio Vasari and Federico Zuccari inside the Duomo, Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

Ely Cathedral, Octagon Lantern Tower viewed from Cherry Hill Park, Ely, Cambridgeshire, England, United Kingdom, Europe

Inner cloister of Fatih Camii Mosque, Istanbul, Turkey, Europe

Georgian house on the Octagon in Westport Town, County Mayo, Connaught, Republic of Ireland, Europe

The Octagon town center of Dunedin, Otago, South Island, New Zealand, Pacific

The Octagon Room, Flamsteed House, Royal Observatory, Greenwich, UNESCO World Heritage Site, London, England, United Kingdom, Europe

The Octagon Room, Flamsteed House, Royal Observatory, UNESCO World Heritage Site, Greenwich, London, England, United Kingdom, Europe

Buckyballs Detected in SMC

Carolingian octagon, Aachen Cathedral, UNESCO World Heritage Site, Aachen, North Rhine Westphalia, Germany

Octagon, Aachen Cathedral, UNESCO World Heritage Site, Aachen, North Rhine-Westphalia, Germany, Europe

Aerial view, Octagon building with Hercules statue, Bergpark Wilhelmshoehe park, Kassel, Hesse, Germany, Europe

Octagon, Aachen Cathedral, UNESCO World Heritage Site, Aachen, North Rhine-Westphalia, Germany, Europe

The Second Cavalier Building, or The Octagon, by Vasili Bazhenov, 1784-85, Tsaritsino, Moscow, Russia

Stowe Landscape Gardens, front, Octagon Lake, rear, Stowe School, the school since 1923, architecture from 1770, Classicism, Stowe, Buckingham, Buckinghamshire, England, United Kingdom, Europe

Aerial view, Octagon building with Hercules statue and cascades, Bergpark Wilhelmshoehe park, Kassel, Hesse, Germany, Europe

Dome in Aachen Cathedral, octagon, UNESCO World Heritage Site, Aachen, North Rhine-Westphalia, Germany, Europe

Dome in Aachen Cathedral, octagon, UNESCO World Heritage Site, Aachen, North Rhine-Westphalia, Germany, Europe

Octagon, blue mosaic-tiled swimming pool on a terrace of an apartment in Majorca, Balearic Islands, Spain, Europe

Low angle view of a stop sign

Seagull perches on a stop sign

Golden bust of Charlemagne on display in the Domschatzkammer, the Treasury of Aachen Cathedral, Aachen, Germany

Interior of the octagonal Palatine Chapel, built by Charlemagne, Aachen Cathedral (Kaiserdom), Aachen, Germany