It was an open sphere, measuring sixty kilometers in diameter, in the exact center of the station. At the center of Hollowtown, the Glowpoint blazed like a perpetual sun, making the interior of the sphere habitable. The walls of Hollowtown had been colonized for generations, with homes, parks, lakes, orchards, and farmland. There was no night in Hollowtown. Residents typically placed programmed blocks of transparisteel above their houses that "dimmed" on a day/night cycle. These were referred to as "shadow-shields." On both sides of the Hollowtown sphere, positioned along the spin axis, was a large cone ringed by six smaller cones; the sets were called the North and South Conical Mountains. Several levels radiated outward from the center of Centerpoint. The first level out from Hollowtown