At the center of existence and outside of realities, there is a place known as The Palace.
The Palace is a dream-like place, taking an innumerable variety of forms based on the will and constitution of The Overseer of Reality.
Surrounding The Palace is The Void, an empty, grand expanse of nothingness that contains The Flow.
The Void has no clear beginning nor end and is seemingly impossible to directly enter or exit.
Traveling from The Palace towards The Void seems to bend space, as you never end up actually leaving The Palace.