Alpenzure Cave is a point of interest within Outcast's Cleft. It is small cave due south from Outcasts Waypoint. The entrance is located in the back of a Sons of Svanir encampment.
The Chest is located at the back of the cave. This may be soloed with an AOE attack, by running past the Sons of Svanir to the Chest then killing the Sons of Svanir surrounding the Chest.