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I cannot remember exactly where in the game this was, but I did see a rocky cliff where part didn't actually meet the ground, so you could see inside the models. As far as I know the wall was still in place, so you couldn't glitch through, but the gap was actually higher than Stranger!
I'm pretty sure this was around the Mongo river, on the way to one of the later bounties. Sorry, I'd have to check where it is and get back to you  Perhaps someone else knows off hand? |
Seen that today, just when you walk down from the port authority towards the river, hold on to your right, and when you see the first tree, in the gap the rock is "hanging".