View inside the Forbidden City at sunset, UNESCO World Heritage Site, Xicheng, Beijing, People's Republic of China, Asia

View of the Forbidden City, UNESCO World Heritage Site, from Jingshan Park at sunset, Xicheng, Beijing, People's Republic of China, Asia

Morning gate, Ngo Mon Gate, main entrance to the Imperial Palace, The Imperial City (Hoang Thanh), UNESCO World Heritage Site, Hue, Vietnam, Indochina, Southeast Asia, Asia

View of the Forbidden City, UNESCO World Heritage Site, from Jingshan Park at sunset, Xicheng, Beijing, People's Republic of China, Asia

View of the Forbidden City, UNESCO World Heritage Site, from Jingshan Park at sunset, Xicheng, Beijing, People's Republic of China, Asia

The Shepherd 24-hour gate clock at the Royal Observatory, Greenwich, UNESCO World Heritage Site, London, England, United Kingdom, Europe

The Shepherd 24-hour gate clock at the Royal Observatory, Greenwich, UNESCO World Heritage Site, London, England, United Kingdom, Europe