Guild Wars 2

Well then, as the title says, I was able to walk inside a wall.
Here it is WICH wall, into the Heart of the Mist.
http://imageshack.us/a/img507/4028/gw086q.jpg

And I was also able to Phase Retreat (I’m a Mesmer) into a Mountain.
http://imageshack.us/a/img690/7208/gw088q.jpg
I was not so smart to take a Screenshot of the map, but (if this can help to locate the mountain) here it is a screenshot taken just as I blinked out of that place (yes, I was able to go away only by Blinking)
http://imageshack.us/a/img37/1575/gw090by.jpg

I hope this information will be of some help!