Ureh has a very high probability to be a playable town in Diablo III. A concept art piece, shown on the right, was named Ureh and there are various official concept art pieces of Ureh seen also in the image gallery.
Ureh on the world map.
Ureh was also a featured in a Diablo novel by Richard A. Knaak called Diablo: The Kingdom of Shadow. Seen in the cover, Ureh was a central town in the story. The connection to the books is important seeing how Diablo III Lead Designer Jay Wilson commented on a recent interview: "people can expect to see characters -- from some of the books." [1]
Ureh has also rich background - it is depicted in the book that in its history, it has worked as a gateway to hell. This has lead to speculation about Ureh's importance and place in the story.
Location
Ureh is an ancient city built at the feet of mountain Nymyr, in the midst of the eastern jungles of the world of Sanctuary. The jungles inhabited by the necromancers.