The grave is that horizontal gate in the area. Minor loot and only two bandits iirc, but the ancient nord armor on him is easier to get than that stronghold in the far south east, can't recall the name.
After 15 playthroughs averaging 150 hours each, and doing the skull of corruption quest at least 5 times, I just noticed that there is a boss chest on the right side of the alter where you pick up the skull of corruption. It's tucked into the wall so it's very hard to see, but I still can't believe I never saw it before!
I just burned an Ice Wolf on the side of a cliff near Saarthal. After I stole his skin, as I was walking away. The mangled corpse of the wolf suddenly flew across my screen and smashed into the side of a mountain.
Another surprising thing. I have a kid and wife, I went home after venturing for a couple months. My kid wants to adopt a Mudcrab she went ahead and named Pincer. I thought it looked better on my wall.