We live in the North now, me and my collection of avatars. Centered around Route 12. Below us are Upper Austra, Lower Austra, Wild West, and Yd Island. Between them are border areas such as Alien Island, Frog Isles, and Lands End. Surrounding it all are the Rim Islands and also Southwestern, where that big rock which obviously doubles as the oracle Carrcassonnee is located. The rock also links Nautilus to the Real World through Iowa. Most likely. Marty disappeared inside it; became one with it. He and Roger Pine Ridge drove all the way to the central square in that old, beat up Chevy that apparently didn’t go into the levy. Marty: how can interior and exterior be the same?
Maybe the answers lie here, a bit outside the defined hypercube.