I was exploring today since it was it's the last day of the alpha. I figured I was done with PvP since I just got my FWC armor colors, and I came across an area called the Grotto.
All the enemies in the Grotto are level "??", obviously meaning they are a much higher level than I am. I rushed through it without dying and it brought me to the forgotten shore. I didn't have enough time to explore the area or else I would die. So I didn't get a good look at what was inside. The Grotto must have some purpose, or hidden area. But what is it hiding?
For anyone wondering on how to find the Grotto, it is next to the area in "The Devils Lair" strike where you have to fight three waves of enemies to unlock the lasers. Instead of heading through the lasers, go into the greenly luminated corner with the broken trucks, then head through a large tunnel which eventually leads to the Grotto, which is full of the Hive.
Edit 1: After a trial run to explore it I found a tunnel being blocked by a "Hive Ogre" that is level ??.
Edit 2: He was blocking what seems to be a dead end. There is nothing at the dead end.
Edit 3: I couldn't find any passages that further the grotto into something else, only the dead end with a Hive Ogre. From what I can tell there is nothing special about the Grotto