There is a wall in the Great Spyre, by Tumok Gravelbeard, that you can walk through. It has an arch in front of it so it is easier to see.Well, I had to go check this out for myself, and yup, there's a glitch alright!
If you give credit, my name is Ronan Dawnhead
COME HERE GLITCHY!
AWW GLITCHY I LOVE YOU!
This actually is a really cool glitch. Here's the spot you enter through the wall.
It's just up the first right ramp as you enter into Tumok Gravelbeard's area and then back through the ruins there. All of a sudden you get to see through the wall and be on the backside of Dragon's Maw.
It's really cool back there! You can run all along that area. It's a pretty open space. I felt like I could open up taco stand back there.
I mean, who wouldn't want a taco on the way to defeat Malistaire, right? MONEY!
Thanks for the tip, Ronan, it was a fun one to check out!