Ceremonial Plaza and the unique elliptical structure of the Temple of the Sun, which exhibits classic Inca mortar-less stonework, at Ecuador's most important Inca site, Ingapirca, Canar Province, Southern Highlands, Ecuador, South America

Yellow rendering on stonework conservation project, Orford Castle, Suffolk, England, United Kingdom, Europe

Pylon 9 with Reliefs, Karnak Temple Complex, UNESCO World Heritage Site, Luxor, Egypt, North Africa, Africa

Roman town of Herculaneum, UNESCO World Heritage Site, Campania, Italy, Europe