This may well be the hardest dungeon to get into in the game...Caer
Sidi is up there with it. But Caer's problem is being so far away, while
CC is just plain tough. Hordes of 60+ mobs to just get to the entrance,
then even more inside...then entrance is inside Avalon City, through a
downwards passage near the center of the town. You'll know you're close
when the guards are the Xar race...