Mods with entirely new maps

I'm looking for mods that feature entirely new world maps, no Vvardenfell at all. I'm just interested in seeing what these mods do and how. I would love to make a mod with an entirely new world map, but I've been struggling to achieve that to say the least. So if anybody knows of any mods like that, or any steps I could take to create my own world in Morrowind without causing a bunch of issues, I'd like to hear about it.