List of UNESCO World Heritage Sites I've seen

I strongly support the concept of a UNESCO World Heritage Site. I believe that if one visits a place (a city or a country), and that place happens to have one or more World Heritage Sites, one must utilize the opportunity to experience them. In this list, I'm trying to list all the World Heritage Sites that I've ever visited. For the Sites in India, year is not mentioned as in many cases I don't remember the first time I visited a particular Site, and I've probably visited some of these more than once. Of course, it's also possible that I might have visited a few other Sites too but I don't remember them.

Also, this list should include any of the various Wonders of the World that I've visited.

1. Agra Fort [India; year unknown]
2. Qutb Minar and its Monuments, Delhi [India; year unknown]
3. Red Fort Complex [India; year unknown]
4. Taj Mahal [India; year unknown]
5. Fossil Hominid Sites of Sterkfontein, Swartkrans, Kromdraai, and Environs [South Africa; 2009]
6. Memphis and its Necropolis - the Pyramid Fields from Giza to Dahshur [Egypt; 2009]
7. uKhahlamba / Drakensberg Park [South Africa; 2010]
8. Cape Floral Region Protected Areas [South Africa; 2010]
9. Mount Huangshan [China; 2011]
10. West Lake Cultural Landscape of Hangzhou [China; 2011]
11. Classical Gardens of Suzhou [China; 2011]
12. Imperial Palaces of the Ming and Qing Dynasties in Beijing and Shenyang [China; 2012]
13. The Great Wall [China; 2012]
14. Seokguram Grotto and Bulguksa Temple [South Korea; 2012]
15. Changdeokgung Palace Complex [South Korea; 2012]
16. Jeju Volcanic Island and Lava Tubes [South Korea; 2012]
17. Mountain Railways of India [India; Feb'20].
1. Specifically, only the "Kalka Shimla Railway".
18. Coming soon...