As you and Valena walk up the valley, the air becomes thinner and thinner. After a turn in the path, you start seeing the turret on your right as well, over a really inaccessible peak. The smoke is still to your left at the time.

You keep walking. Eventually, you reach the point where trees do not grow anymore and the only vegetation is composed of grass and lichens. While the way to the smoke keeps going up, you start having a clearer image of the place: it is a sort of plateau, with many huge rocks scattered in the rugged outline of the land. You see the camp in the distance, and you can make out the shapes of some huge humanoids - probably the giants you're looking for.