"It's a spell, sort of. The Sidhe can just open it, like opening a door into our world. I have to use a wand. You travel through it to get somewhere else. Kind of like a wormhole. I mean we don't leave Earth and step onto the Klingon homeworld, but it only takes a few hours walk through the Nevernever to go from Chicago to Scotland. That's why I think this place is connected to it somehow. I was in Chicago and now we're in California, or at least a reasonable facsimile of it." Molly explained as best she could what it was like.