I would cost, what, $400 or so to charter a boat from Los Angeles Harbor to just head due west? The way the insanity compounds on itself is spectacular.
I seem to recall that most of these people believe the "edge" cannot be reached by sea or land due to hypnotic waves, or magnetic fields, or something like that; when you get too close, you become confused and turn around, fooling you into thinking believing that you've circumnavigated a sphere.
They claim the edge of the world is at the south pole.