That's right folks, a temple, in the far Depths of the Maguuma Jungle...











This last image shows the ramp to the main temple, and as you can see it resembles the ramp into Heroes Ascent, which is the Underworld (Grenth) and nothing really to do with Balthazar (FoW). Also look closely at the Eye, this is also visible on the Home of Grenth (that big place adjacent the Ice Wastes with a massive shiny door) and the Chaos Plains shrine area. It also could relate to the Mursaat, and the Eye of Janthir.

been there done that:P

thre is an identical temple in lornar's pass,for grenth, slightly more elaborate too, ice etc