Hello ArenaNet
First of all, I apologize for my english, but I haven’t seen any “map art issue” topic in the french forum, so I post this here.
This Issue is located in Harathi Hinterlands, over a little building where texture is placed on a non-physical 3D model, while the actual 3D model has a different form. This makes us able to walk through/over the texture.
I hope screenshots will be help you much than what I can say. Kinda hard to explain this in another language 
The waypoint on the minimap is the “Junction Camp Waypoint” in Harathi Hinterland
Best regards
