Gyldenhul Barrow (Dragonborn)

Interior
Upon entering Gyldenhul Barrow you will require the Ancient Nord Pickaxe gained from Glover Mallory  in Raven Rock. You can then use the pickaxe to mine the Stalhrim in the coffin on the right hand side to gain further entry. The coffin on the left contains a Draugr body with some gold.

Tthe barrow is full of treasures. In this case, many piles of gold (8000+) and assorted gems, potions and weapons.

As soon an item is picked up, the gate behind will close. When you continue through the door ahead, you enter a large room.

Deathbrand
Here you will find the remains of Haknir Death-Brand. You can loot his body for minimal items, and located just behind his body is a named weapon "Bloodscythe". When you take Bloodscythe, the ghost of Death-Brand will appear. Upon his defeat you receive his other weapon, "Soulrender".