According to the UNESCO World Heritage Site List, there are 878 properties in 145 member countries. Of these, I’ve only been to 36 so far. I’ll have to do better. Edit: Now up to 38. Still 840 to go.
1. Angkor, Cambodia
2. Canadian Rocky Mountain Parks, Canada
3. Historic District of Old Québec, Canada
4. Waterton Glacier International Peace Park, Canada
5. Joya de Cerén Archaeological Site, El Salvador
6. Historic Centre (Old Town) of Tallinn, Estonia
7. Chartres Cathedral, France
8. Palace and Park of Versailles, France
9. Paris, Banks of the Seine, France
10. Historic Fortified City of Carcassonne, France
11. Antigua, Guatemala
12. Tikal National Park, Guatemala
13. Maya Site of Copan, Honduras
14. Haeinsa Temple Janggyeong Panjeon, the Depositories for the Tripitaka Koreana Woodblocks, Korea, South
15. Seokguram Grotto and Bulguksa Temple, Korea, South
16. Gyeongju Historic Areas, Korea, South
17. Jongmyo Shrine, Korea, South
18. Changdeokgung Palace Complex, Korea, South
19. Jeju Volcanic Island and Lava Tubes, Korea, South
20. Pre-Hispanic City and National Park of Palenque, Mexico
21. Pre-Hispanic City of Teotihuacan, Mexico
22. Schokland and Surroundings, Netherlands
23. Historic Centre of Saint Petersburg and Related Groups of Monuments, Russia
24. Alhambra, Generalife and Albayzín, Granada, Spain
25. Works of Antoni Gaudí, Spain
26. Agricultural Landscape of Southern Öland, Sweden
27. Historic City of Ayutthaya, Thailand
28. City of Bath, UK
29. Mesa Verde National Park, USA
30. Yellowstone National Park, USA
31. Grand Canyon National Park, USA
32. Redwood National and State Parks, USA
33. Olympic National Park, USA
34. Statue of Liberty, USA
35. Yosemite National Park, USA
36. Carlsbad Caverns National Park, USA
37. Mill Network at Kinderdijk-Elshout, Netherlands
38. Monastery of the Hieronymites and Tower of Belém in Lisbon, Portugal