Both hell (on the right of the viewer) and heaven (on the right of Christ) are visible in the fresco.
The structure of the picture opposes disorder and agitation, in hell, to order and calm, in paradise. The colour structure both makes it easier for the viewer to read the picture clearly, and also actively participates in the balance of the visual effect: In hell, a red river of fire takes the souls, while in paradise, a white light embraces everything. Note this interesting detail: The Apostle Peter unlocks the door of paradise for the righteous.