Something like this. I don't want to scar the land just to build a simple fence.
W3 to W6 - Blockland. Special mentions: New Avalon, Tarn of Hotdog, Red October. W7 - Elvenia, til we all got lazy. W8 - Cult of R'lyeh, til the deeps called us back. W9 - Tartarus, til death/wizards came for the land itself. W10 - ???, ruined and forgotten.
"The psychological trials of dwellers in the last times will be equal to the physical trials of the martyrs. In order to face these trials we must be living in a different world."