How can I build Apadana?

[LoneDragon]

The only restriction I see is that it must be next to the capital. I have 2 empty spaces next to my capital (both are flood plains) and it says no suitable location for construction.

 

[XVeris]

Floodplains restrict the placement of districts and wonders, unless you're building the Pyramids or you're Egypt.

 

[LoneDragon]

Floodplains restrict the placement of districts and wonders, unless you're building the Pyramids or you're Egypt.

Stupid fertile Nile area!