Someone should make a virtual mansion or tower block(software for the internet) where which ever way you go you come back to the start.
If you go up the stairs you will eventually end up on the same floor as you started. If you go down a corridor and go in a room and through the next room you will eventually return to the start without having done any kind of going back on yourself.
Then people might understand that there is no "edge" to the Universe.
Perhaps in some rooms the tables and chairs could be on the wall or ceiling(so that orientation isn't an issue)and the person can float through the space.