"When you go to the west, you would run into a tribal hunter, who would run from you further to the west. Follow him (remember that you can disabled Giant Plants by rubbing the bulbs; do not attempt to attack them directly, it's still just as lethal as before) right until you pass through the mushroom field. When he follows to the east by passing another plant, instead of following him, backtrack and go through the northern entrance, which would force the hunter to move to the east instead. When the hunter would disappear, search for a hidden entrance in the northern part of location." (с)