Tomb of Lihyan, son of Kuza (Qasr al-Farid), carved into sandstone outcrop within the Site of Hegra, UNESCO, AlUla, Medina Province, Saudi Arabia

Skilled craftsmen at work making Pietra Dura souvenirs using traditional old-fashioned grinding wheel in Agra, India

Skilled craftsman at work making Pietra Dura gem souvenirs using traditional old-fashioned methods in Agra, India

Nelson's Column, monument to Admiral Lord Nelson in Trafalgar Square, London, United Kingdom

Westminster School Memorial outside Westminster Abbey, London, United Kingdom

Westminster School Memorial outside Westminster Abbey, London, United Kingdom

A stone carving of a religious icon in Nepal.

Queen Elizabeth I statue on Westminster School Memorial outside Westminster Abbey, London, United Kingdom

Traditional Spanish architecture in Leon, Castilla y Leon, Spain

Russia, St Petersburg, The Church of Spilled Blood.