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

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

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