Airborne Kingdom

The wonder locations are randomised every game ( I believe) but they always appear on the smaller islands.
There is 1/3 of each wonder, in each of the three regions.

If you're strruggling to find any of the parts for the gardens:

1. Check each region to see where you previously got a part
2. Once you know which region to search look for the small islands around the big cities, especially look for ones without identified settlments, or floursent pools, etc
3. Finally try instead to get the Nomad’s Orrery, once constructed it revelas what you're missing