The massive entrance of the Federation's No.1 Underground City extends downward from the Star Port. It reaches three hundred layers deep, resembling a reverse Babylon Tower with a spiral structure that descends into the earth. The entire Underground City functions as an independent subterranean hive city, spanning tens of kilometers, with each layer full of connections. Unlike Underground City No.9, besides its immense scale and population, it boasts an exceptionally well-developed public transport system. Hundreds of magnetic levitation cars zoom through like meteors, circling through this world buried a thousand meters underground.
Dawn City, No.1 Underground City, Earth Core Administrative Hall.
