Duke 3d user map sites

[DukePlayer1]

I've been looking for old websites that have working Duke 3d map downloads and thought a good list should be made OBviously CGS is one place.

[Puritan]

Check out those links at the front page.
Should be plenty to choose from.

[Forge]

Old sites are neat to look at with their old-school layouts and graphics, but most of the maps worth anything are already here or at MSDN