Guild Wars 2 - map to be opened after Entanglement?

I'm guessing that a slight oversight in the current map allows you to go out of the standard play area and enter part of the map that is going to open later on. Found it a couple of days ago, but i wanted to stroll around alone for a bit more :P

I know i know, it's not photography or design or anything else based. But i guess it's map and video game ... design? :P