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.
This map requires Ziggurat Mod to function properly.
https://aow.heavengames.com/downloads/updatefile.php?id=1231
Discord server
https://discord.gg/2YMyfa2
LORE
Four wizards have travelled to the utttermost depths of the earth in search of a hidden realm of great wealth, named Agartha. In this far region the surface is a forgotten memory, inaccessible without months of travel back through winding subterranean rivers. Now these four have found the complexes of ruined Enkata, where the cities have lain silent for centuries, but the ancient teleporters are still active. Some of these teleporters are the entrance to Agartha's wealth. There is no history of an exit from Agartha, but a wizard can transport himself as he pleases. His troops are another matter.
As for the wizards, the human Herel has allied with the Azrac Salman. A fatal rivalry has developed between these two and the second pair, the Orc Vinadro and the Lizardman Sothuss. Agartha's wealth is more than enough to supply all four - but their pride will not permit it.