Hm i didnt know that being moderator of this forum meant being the world´s expert in Bg1 ...
Anyway, as someone said, everytime you visit a map, you should try exiting from every part of the map (south, north, east, west). That way the new areas will be marked in your map, and later you will be able to visit them from any place.
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You up ?? Beware !! When falling, better fall from down