underground locations?????

#1elitejellyPosted 6/26/2010 2:05:12 PM
i look at this map and found all the underground locations according to this map and i counted 50 underground locations. i haven't got the achievement yet. how many underground locations are there? where are the one's iam missing?
http://www.games32.com/web4/games_catalog/games/Two-Worlds-PC/images/9400.jpg