Yes, Western Approach is fine for me too. But I've run around everywhere in the plains that isn't blocked off by invisible walls, and can't get 21/21.
I've done the operation and crossed the bridge, and run around that area.
I've done the operation to the grove and run around that area.
I've done the elven puzzle and killed the dragon and run around that area.
I've done the big hand pit thing.
I've done the graveyard ruins.
I challenge anybody who says they DO have 21/21 to try and list the names of all 21 areas.
I'm going to run around and list them all later, just to see if maybe I've been in 21 areas and for some reason one of them just won't trigger the counter. Like in Black Flag, where the Kingston Viewpoints were stuck at 8/9 forever even though I did all 9 multiple times.