UNESCO World Heritage Sites Redux

To quote myself from a previous post, one of my professors at Rollins College used to describe World Heritage Sites in this manner:

"If aliens were to land on Earth and you wanted to tell them where the most important ecological, cultural, and historical sites on the planet were, you would use the list of UNESCO World Heritage Sites."

Before my vacation, I had visited the following World Heritage Sites:

1. Area de Conservación Guanacaste - Costa Rica
2. Talamanca Range-La Amistad Reserves / La Amistad National Park - Costa Rica
3. Canterbury Cathedral, St Augustine's Abbey, and St Martin's Church - United Kingdom
4. Maritime Greenwich - United Kingdom
5. Stonehenge, Avebury and Associated Sites - United Kingdom
6. Tower of London - United Kingdom
7. Westminster Palace, Westminster Abbey and Saint Margaret's Church - United Kingdom
8. Cathedral of Notre-Dame, Former Abbey of Saint-Remi and Palace of Tau, Reims - France
9. Paris, Banks of the Seine - France
10. Everglades National Park - United States
11. Statue of Liberty - United States
    
12. The Great Wall - China
13. Imperial Tombs of the Ming and Qing Dynasties - China
14. Summer Palace, an Imperial Garden in Beijing - China
15. Temple of Heaven: an Imperial Sacrificial Altar in Beijing - China
16. Historic Centre of Lima - Peru
17. Pre-Hispanic City of Chichen-Itza - Mexico
18. Pre-Hispanic Town of Uxmal - Mexico
19. Historic Villages of Shirakawa-go and Gokayama - Japan
    

Now that the trip is over, these places can be added to my list, bringing my total to 25:

Complex of Hué Monuments - Vietnam
Ha Long Bay - Vietnam
Hoi An Ancient Town - Vietnam
My Son Sanctuary - Vietnam
Town of Luang Prabang - Laos
Angkor - Cambodia

This is the list of all 851 UNESCO World Heritage Sites. Have many have you visited?