Stepped Pyramid of Djoser, the first pyramid, complex of Saqqara, UNESCO World Heritage Site, Egypt, North Africa, Africa

Restoration of Notre Dame Cathedral, Paris, France

Restoration of Notre Dame Cathedral, Paris, France

View of Unfinished Obelisk in Aswan quarry on a sunny day, Aswan, Nubia, Egypt, North Africa, Africa

Inner structure in teak wood of dhow under construction in traditional shipyard, Sur, Ash Sharqiyah Region, Sultanate of Oman, Arabian Peninsula

Inner structure in teak wood of a dhow under construction in traditional shipyard, Sur Township, port-city, capital of Ash Sharqiyah Region, Oman

Welder at work in a workshop in Marrakesh, Morocco

Pygmy dwelling, Dzanga Sangha National Park, UNESCO, Central African Republic

Wooden cart for transporting pottery, Taoyang Alley, Jingdezhen (porcelain capital of China), Jiangxi Province, China

View of Unfinished Obelisk in Aswan quarry on a sunny day, Aswan, Nubia, Egypt, North Africa, Africa

Quadrangle of the Nuns, detailed view, Uxmal, Yucatan State, Mexico

Titanium clad facade, Guggenheim Museum, Architect Frank Gehry, Bilbao, Basque Country, Spain, Europe

Fortified house, known as Tata Somba ('Somba house') in a Tammari (also known as Batammariba, Tamberma, Somba, Otamari) village, Atakora department, Benin, Gulf of Guinea, West Africa

Traditional barn-fortress for crop harvesting, Tallate, Anti-Atlas, Morocco

Guedelon Castle, medieval-site, construction of a castle, using techniques and materials used in the Middle Ages, Treigny, Yonne, France, Europe

The wooden frames of huts under construction, Danakil Depression, Ethiopia

Coal tug at the Niederfinow boat lift, Brandenburg, Germany, Europe

Steel cable fixing of a suspension bridge, Friedrich-Ebert-Bruecke, Duisburg, NRW, Germany

ESP, Spain, Beneixama: Solar power station, built by the german City-Solar-Group

Museum of technics and natural science, Bavaria, Munich, Germany, Europe

Colonial style church on the mountain with moonlight in the background in the historic city of Ouro Preto in Minas Gerais, Brazil, Brasil, South America

Transporter bridge over the Oste River between Osten and Hemmoor, Lower Saxony, Germany, Europe

New music school reflected in a pond at dusk, unique architecture, Fellbach, Stuttgart, Baden-Wuerttemberg, Germany

Village with round huts near Mora, Cameroon, Africa