The Gates of Avalon are large, golden gates that guard Avalon and stop anyone from entering. It is also the place where mages turn dark, if they ever do. Many bondeds have been killed here.
Emily met Neerie here for the first time, who presented her with a new magic stone, the Heart of Avalon. It is learned that the gates of Avalon also have water surrounding them, since Neerie was able to form here.
Emily, Miranda and Sylvan all turned dark here. Lucinda was sent to the astral planes by her sister Miranda here as well. Sylvan was also fused with a giant spider here.