Guild Wars 2

I have completed 175/176 areas in Ascalon. I get the impression that you get credit for an area when you discover it, not when you complete all vistas, way points etc. Is that correct?

I have 100% map completion in all zones except for the (for me) impossible vista and skill point in Diessa Plateau at the Breached Wall. I’m hoping I need one more area like a cave or something that doesn’t have a Waypoint or POI. Something quirky that isn’t obvious, any thoughts?

Explorer achievements and world completion are indeed separate things. Explorer is for unfogging named areas of a given map. Go map by map, check for fogged areas, compare them to the wiki (check areas on the wiki that don’t have any POIs or waypoints etc. since you know you already have all of those).

Keep in mind that it usually seems like there are more areas than are needed, because some of them end up not counting (almost certain you can get the achievement without entering vexa’s lab, for example).

http://wiki.guildwars2.com/wiki/User:Bluestone/Explorer

Cross reference everything on those lists. You will find your spot.