You've probably noticed this. In the following screenshot:



There is a crystal formation in the background. On the official site, this can also be seen on the left half of the picture, showing that it's not a monument specific to a single area. However, the area shown on the official site does appear to be in a tent, but a tent much larger than the one seen in the screenshot. It's possible that they're the same tent, or that the official site's art is simply promotional artwork that isn't meant to represent a specific part of the game. But if it does represent something of the game, I'd think that there are multiple tents set up around places, and that the crystal formation links them somehow.

What do you think?