Inilaraafin (3.5e Environment)
From D&D Wiki
 Inilaraafin, The Spiraling Cacoon
A Dark Elf city-state of Mysteries of Andor is under (halfling nation). The city is a large cone-shaped cavern with a gigantic column extending down the middle. This column acts as the city clock, and the upper portion of it is also the ruling house (which also extends into a treehouse fort on the surface in the woods). The walls are carved in such a way as to spiral upwards with considerable sized layers with streets and buildings. Generally, noble houses are built into the wall while businesses and pathetic shelters are built on the layer itself. Some cars are used here, as surface trade allows the Dark-Elves of Inilaraafin to acquire oil without drilling too deeply for it (which would invoke the wrath of the Sea-Elves to the south).