The Thorn (Fallout: New Vegas)

The Thorn is an underground settlement. The R in the sign is pointing to the sewer, letting you know that is the main entrance. Next to The Thorn is the entrance into Westside.

Layout
There is a large underground section beneath the sign. It appears to be a large arena, and surrounding the sides are cages with wild animals (deathclaws, geckos, ect...) and a chamber for Red Lucy.

Bugs

 * Crash-to-Desktops are very common in this area, especially while fighting in the Arena. Save often.
 * After defeating any animals in the Arena, the doors open allowing you to leave. A second or two later all the gates that just opened for you to leave instantly seal and the only way out is through the side of the Arena, which itself is sealed unless this glitch occurs. This can easily cause you to get caught in between the two doors leading into the Arena with no way out except the console. This doesn't happen every single time but it's extremely common.
 * On X-Box 360 and PC, when betting on a fight between two giant mantises, the creatures enter the arena and do absolutely nothing (as if not hostile to each other). Red Lucy is unable to be interacted with and the fight remains a permanent stalemate, unless you want to shoot one and have Thorn turn hostile.

Appearances
appears in Fallout: New Vegas.