Anyone know the best route up to get into Fort Lully so I can get the 3rd chest that is inside the fort? I can't seem to find any area to scale the walls at either the beach or the dock area, though I did of course find teh chests at both parts. It SEEMS like with the east beach, there is an area you are supposed to climb up, but I can't find any any areas to grab onto there; also there is a ramp of sorts that Adewale is able to easily scramble up, but again, when he reaches the top, he just slides down...there's no way to grab anything to pull yourself up and into the ruins.

Any thoughts/suggestions?