Halfway through the corridor concepts I realised that there was absolutely no point designing the corridors if I didn't know what they would be sitting in. So, a possible design for the space station. Structurally sound? Debatable. Impractical? Absolutely. Visually interesting? Okay, it's got that down.
Is the black pillar thing an engine, a generator, a mysterious thingummabob from a distant world? Who knows. All I know is that there needed to be something in the middle, and so there was.