The town of Vesper is inaccessible in the release version of Ultima Forever. Not that it isn’t present in the game; it’s located to the south-east of the Shrine of Sacrifice, but it can’t be accessed by land. Mountains, forests, and even a moongate stand in your way if you try to access it. (I think, assuming Ultima Forever‘s boating system had been preserved, Vesper was supposed to be accessible by sea only.)
However, one of the MYP files for PC alpha version of the game could be opened using EasyMYP…and inside it, I found the map of Vesper.
Exactly what events in the plot of Ultima Forever would have transpired in Vesper remains unknown.
Work proceeds apace on Ultima IX: Redemption -- the team has been working on NPCs in places like Vesper, on dungeons like Covetous and Hythloth, and on the in-game tutorials (among many other things). They're also in need of a 2D artist...so, if drawing is your thing, drop them a…
What is it? It's a recreation, by Ryan "Zerker" Armstrong, of the entire world from Ultima 7 for The Moon Project, a science fiction RTS released in 2000 as a sequel to the excellent Earth 2150. You can download it from the project entry here. This is a multiplayer map…
Once again, there’s a certain resemblance to the U4 Vesper: http://wiki.ultimacodex.com/wiki/File:U4_Vesper.png