Follow the Path Up to the Tower
Talk to Jacob and look around the settlement for a few minutes, and then set off toward the tower, to the southeast. A Strongbox is on the way, pretty much on the path you need to take to leave town. Don’t spend time looking for a new Base Camp here; there is one only a minute away, but it’s not in town. Cross a small river and advance on your next objective. The Aqueduct Ruins is on the right after you get across the water.
Leave camp and walk toward your objective. Another destroyed bridge is in the way, but a long jump from Lara gets her most of the way across the chasm. Catch onto the rocks with your Axe and climb to the top. The path leads into an ominous building, taking you quickly to the entrance of the Acropolis.