Ustengrav

Ustengrav is an underground area where bandits appear to have been living. When you go there for the first time bandits and necromancers are fighting each other. If you travel through this you will find a door to Ustengrav Depths. The depths have very low level enemies (mostly Skeletons) and at the base of the depths next to a waterfall you will find an altar that will give you a part of the Become Ethereal shout.

Ustengrav is the burial site of Jurgen Windcaller, the mortal progenitor of the Way of the Voice. When the player first reaches Jurgen's tomb, they find that his horn has been replaced by a note summoning the Dragonborn to one of the last remaining Blades.

Hidden treasures

 * Inside the waterfall by the altar there is a chest guarded by a Restless Draugr.
 * The rocks surrounding the Thu'um altar contain precious minerals such as gold, silver and corundum
 * There is also a hidden room behind the small "Skeleton Court Room". To get there you have to jump atop the pillars and use the "Whirlwind Sprint" Shout. Inside a Soul Gem is found, along with a chest containing some gold and assorted potions.
 * There is a silver ore vein & a corundum ore vein in the pit with the waterfall.