Si Wong Rock

A giant rock mesa that rises shockingly from the rolling dunes of the desert and looms imposingly over the landscape. It appears incredibly out of place in its surroundings, and Sandbender lore claims that it was dropped from the sky by the gods to prove their power and anger when humans stopped following the rules of their priests. Whatever its origin, the rock is the only landscape feature of note in the desert, and is thus used as a guidepost by the Sandbenders and any others who must navigate a trip through the Si Wong. In addition to its use as a visual landmark, the rock is composed of a metallic ore that makes it magnetic, which allows the Sandbenders to create compasses that work throughout the desert, giving them their coordinates in relation to the rock.

This is the rock that housed the Buzzard-Wasps and was seen in The Desert. This is also where Aang enter the Avatar State once confronting the Sandbenders.