So I did with the rocks over the bridge. But when I continue, I run into the more concrete terrain of the map and hit a dead end. Don't know if I have to backtrack or need to do something else.
Viewing post in Gameplay/Mechanics Discussion
It's pretty much a straight path. There's a little bit of a divergence while you're still in the ruins, but just explore both ways. You have to be sure you get the dynamite for the boulder/rock later. Once you fight both ambushes and go through the little underground area though there's really only one way to go, just over to the right, up, and back to the left.