Lost Lands

The Lost Lands was a land mass introduced with the Ultima Online: The Second Age expansion.

It consists of 2 cities, Papua and Delucia, a land mass on which monsters spawn (in some cases fairly hard ones), and a dungeon known as Terathan Keep.

It is not clear if the cities of the Lost Lands are part of Britannia proper (meaning if the are ruled by the Crown and the Britannian Council) or not.