X-66 Hexcrete Archipelago

X-66 Hexcrete archipelago is a location in Big MT in 2281. It is directly north of the Z-38 lightwave dynamics research station, southeast of the X-13 research facility and west of Z-43 innovative toxins plant.

Background
It is made up of large hexagonal structures sticking upright from the ground, ranging in height from shorter than the Courier to several stories tall. There is also a pool of radioactive liquid that emits 1 rad per second. Two packs of night stalkers spawn to the south and east, in range to attack. In addition, its proximity to the X-13 research facility means that any Robo-Scorpions guarding it will attack the player character when venturing north from the location.

Appearances
The X-66 Hexcrete archipelago appears only in the Fallout: New Vegas add-on Old World Blues.