Extended more than once
WHS that have had extensions added more than once.
Connected Sites
| Site | Rationale | Link |
| Frontiers of the Roman Empire | 2x | |
| Glacier parks | 2x | |
| Imperial Tombs | 2x | |
| Kakadu National Park | 2x | |
| Mountain Railways of India | 2x | |
| Potala Palace | 2x | |
| Potsdam | 3x | |
| Primeval Beech Forests | 3x (2011, 2017, 2021) |
Suggestions?
Do you know of another WHS we could connect to Extended more than once?
A connection should:
- Not be "self evident"
- Link at least 3 different sites
- Not duplicate or merely subdivide the "Category" assignment already identified on this site.
- Add some knowledge or insight (whether significant or trivial!) about WHS for the users of this site
- Be explained, with reference to a source