Out of Bounds Adventures
http://www.youtube.com/watch?v=t7APFci5iNA
The Merry-go-round
The setup is fairly easy, just go to William's fortress to the place where you would normally infiltrate for an early infiltration and then drop down a bit. I press 
upon hitting the pillar, just to be safe. Then it's just a question of punching and sticking close to the rocks. Don't get greedy, or you will fall off.
I've never been able to make it round fully, but I've only tried once (the attempt in the video). See this as a challenge. First to get it will get one internet!
On Top of the Wall
For the first time, Altaïr on the wall, without relying on cheats. Just honest exploits. 
You'll have to mess around with first walking angle a bit before you can start punching. Unfortunately, I wasn't able to get on top of the towers and I also couldn't get further than what I showed in the vid.
Some of the jumps are a bit tricky and I rely a bit on corner boosting and wall runs.
Beyond the Exit
This is a neat little trick I found in Jerusalem after watching Jubair's Early Death. Luckily, guards can go right through the invisible wall, so you don't have to rely on other tricks. There's quite some area to explore beyond the walls. I show some bounds and how you can use the guards to prevent falling to your death where the grounds end (and then I promptly fall to my death ).
Make sure you don't come too close to the horse standing right outside the gate; you'll activate the travel trigger and there will be no way back.
This is also possible on the gate in the middle district (not the main gate, the one at the back), but there wasn't much to show there so I left it out.
Along the Chasm
Using a combination of the tricks I used before (counter through a barrier and punching to get moving), I was able to get out of bounds the instant-kill chasm just outside Damascus' main gate. I also found a place to get under the map, but unfortunately you can't get out of there, so you'll have to commit suicide. I also show what happens if you enter the 'death area'. It's quite amusing.
Another challenge: reach the gate near the rich district going OOB. I haven't been able, though I tried quite a few times.
Hope you enjoyed watching the vid. 
I enjoyed the video a whole lot! Thank you good sir!
That jump over the flag pole at ~4:10 was my favorite, i got to say.
Nothing like some mountain climbing in ACI!
Thanks. 
That jump really is a weird one, but it works.
I really enjoyed this, especially the merry-go-round.
You say you've never been able to finish out. Would it be possible to grab the ledge there at the end and simply move along it to climb over the wall? I assume you've tried already.
Overall, this was a very fun video. I liked the ending with the mysterious chasm death. The ground must be lava.
“Force has no place where there is need of skill." Herodotus
Yes, that's what I tried in the video, though you can't really see it. I only tried it once (in the video), so I definitely think it's possible. I've been wrong about that in the past, though.
maybe, for proof of concept, you could go over the wall the other way and climb to that spot to see if it's a ledge you can actually hold onto. no use in going all the way around several times only to find out the game doesn't render it as an actual ledge, but a flat surface.
“Force has no place where there is need of skill." Herodotus
I did that already, but thought it wouldn't add much to the video.
I did that already, but thought it wouldn't add much to the video.
And you CAN climb over to it? Hmm, if so, then it should be possible. Maybe I'll give it a shot tonight.
“Force has no place where there is need of skill." Herodotus