Ulnari

Not necessarily clearing, but maybe an entrance to the city in the middle of the dungeon. The main point here is that the 2nd big city is below the surface. @mathewfarmery: good suggestion to use the setup to control the flow of the game. I prefer a game that follows a path over the newer auto scaling games where you can go anywhere regardless of your character's level.

Please make the 2nd big city part of the endless dungeon. Like a big drow or dwarven city far below the surface, at the end of the dungeon. Whatever its inhabitants (maybe a mix of races, having resettled the ancient city ruins), it should be deep below the surface, and only reachable through the endless dungeon. This would give the endless dungeon a real purpose. Thanks for reading, Obsidian. Edit: Clearing the endless path is not important here, the 2nd big city can have its entrance anywhere in the dungeon, e.g. as a supply and quest base. The main suggestion is that the 2nd big city is subterranean. A city below adds more variety than two big cities above ground.