The elevated city could only be reached by airship

Dahlia grew up in the Low Levels, the electric lights dangling from the underside of Arratha forming her night sky. She trained for years to be an airship pilot so that she could rise above the city skyline and marvel at its shining buildings. She was never allowed past the landing dock, but that view was worth every lesson.

Arriving to Arratha, City of Science [Michal Matczak on deviantART via r/ImaginaryCityscapes]