Well-Stacked Cairns

Well-Stacked Cairns is a companion perk in the Fallout: New Vegas add-on Honest Hearts.

Effects
When Follows-Chalk is in your party, reaching any summit in Zion (such as Ranger substations) will reveal all nearby map markers and inspire a heightened sense of awareness (Perception +3) for three minutes.

The trigger area for this perk is usually close to the fast travel point.

There are six summits that trigger this perk listed below with the map markers they reveal:
 * The Spine
 * Two Skies Cave
 * Virgin River
 * Old Rockville Bridge


 * Ranger Substation Peregrine
 * Ant Burrow
 * Virgin Fork Campground
 * Eastern Virgin
 * Ranger Substation Eagle
 * Bighorn Bluff
 * The Bend Bridge
 * Court Fork Overlook
 * The Aerie
 * North Fork Campground
 * North Fork Bridge
 * Patriarchs' Campground
 * Sun Sentinels
 * East Fork Bridge
 * Zion Fishing Lodge
 * Sorrows Fork Campground
 * Ranger Substation Osprey
 * Cueva Guarache
 * Zion Ranger Station
 * Caterpillar's Mound

Behind the scenes

 * A cairn is a man-made pile of stones or rocks used for navigational landmarks. They are commonly found at the summits of mountains.