Grand Staircase

The Grand Staircase is a stretch of land east of Zion Canyon, located within the Colorado Plateau.

Background
The Courier is tasked with finding a map of the region and can then choose to evacuate the Sorrows to Grand Staircase. Here they set up their new settlement with the help of Daniel.

Appearances
The Grand Staircase is mentioned in the Fallout: New Vegas add-on Honest Hearts.

Behind the scenes
The Grand Staircase is a real world region known as the Grand Staircase–Escalante National Monument, which consists of a large swath of protected land in southern Utah.