1. Buckingham Palace's facade.
2. The Louvre Museum's Pyramid.
3. Notre-Dame Cathedral's exterior.
4. The Metropolitan Museum of Art's building facade.
5. The Flatiron Building in New York City.
6. The Basilica of San Francisco de Asis in Cuba.
7. The Taj Mahal's white marble exterior.
8. The Tower Bridge in London.
9. The Sydney Opera House's concrete exterior.
10. The Spanish Steps in Rome.
Publication date: