it may requires special placement rules, try to use the method here :
https://forums.civfanatics.com/thre...tural-wonders-position-of-a-ynamp-map.621144/
and put a line for every plot (it's a 4 tiles wonder ? then 4 lines, see the example in the thread linked above with FEATURE_SUK_TONLESAP and its 2 plots placement using 2 lines)
https://forums.civfanatics.com/thre...tural-wonders-position-of-a-ynamp-map.621144/
and put a line for every plot (it's a 4 tiles wonder ? then 4 lines, see the example in the thread linked above with FEATURE_SUK_TONLESAP and its 2 plots placement using 2 lines)