Is there a fence in sol theism and anything else it lacks?

do you mean an invisble wall blocking players from leaving the map? yeah there is, other wise we could walk to Vvardenfell.

Actually i would be interested if any one has or will find a glitch to get past the invisble wall like what was done for the vanilla map to see the white gold tower. especially since the whole height map of tamriel is supposed to be in the game.