This map has no surface level - at all!
The upper caves are full of ruined cities, which can be reanimated using the Animate Ruins spell from a starting-area Wizard Tower. The upper caves have 1-way teleporters leading to a lower level that contains many income structures.
Lore is described ingame.
This map requires Ziggurat Mod to function properly.
https://aow.heavengames.com/downloads/updatefile.php?id=1231
Discord server
https://discord.gg/2YMyfa2