To travel between universes, you must visit a place that's profoundly unnatural: the monoverse of the White. There, surrounded by blankness, you confront what it means to have only one timeline, one future, and no alternatives. A few go mad; most of us just learn to endure it to get to the next string in the multiverse.
This incredible, minimalist image was created by Richard Anderson, a concept artist who has done work on everything from games to film and book cover art. Currently, he works at Framestore. You can see more of his work on his website.