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Abandoned Outpost is a point of interest within Spirit Vale. It is located across the bridge from the entrance to the Spirit Woods. The area hold multiple spirit foes upon first arriving. Additionally there is a Hidden chest located on top of a pillar as well as one below the balcony. The torch used for the Keep the Lights On achievement can be found here.
An abandoned fire-pit can be seen in the area, along with a few other hints showing this area was somewhat recently deserted before being occupied by the ghosts.