Southern Passage

The southern passage is a location in Zion Canyon in 2281. It is a connection of tunnels and passages that travel back to the northern passage in the Mojave Wasteland after the Honest Hearts add-on. It is where the journey into Zion begins.

Layout
There are three duffle bags located against the rocks near the ambush site, which can be used to safely store items until Honest Hearts is completed.

Notable loot
In addition to the cave, once the main story is completed and the final cut scene has played, in front of the cave entrance will be a footlocker which will contain the following unique items, provided they have not already been obtained:
 * A Light Shining in Darkness
 * Chalk's headdress
 * Joshua Graham's armor
 * Daniel's hat
 * Daniel's outfit
 * Salt-Upon-Wounds' helmet
 * Salt-Upon-Wounds' power fist
 * Scripture

Appearances
The southern passage appears only in the Fallout: New Vegas add-on Honest Hearts.