in the Wenekra Fort outside you can go into the wall. it doesn't take much time but it may take a few trys. In the exterior there are two monoliths (floating book looking things). They are against the wall so keep trying to walk behind them. after a little bit you can walk behind them and through the wall. it may take a few trys because you might walk behind it to the other side.

the glitch lets you walk around in mid air and you can also walk through certain walls if you find the right ones.