A semicircular chamber features a raised dais along its curved eastern side. A great pile of stones rests atop the dais. It looks like a cairn, but if so, it is the resting place of something enormous. Three smaller cairns, of roughly human or elf size, lie clustered on the floor before the dais.
As with many ofthe other structures through which you've traveled in this place, the walls of this chamber are covered in runes.