The ruined building is a location in Sierra Madre's Puesta del Sol North in 2281.
The ruined building can be difficult to get to, as it involves jumping from the shingles of a rooftop to a balcony. It can be used as a "safehouse" for the player, as it contains one of the very few beds in the Sierra Madre that can actually be slept in.
A round table sits in the center of the one-room building. To the east is a bathroom and bedroom and to the west is a kitchen. A terminal sits on a desk outside the kitchen. There are two doors that both lead outside to Puesta del Sol North.
The ruined building appears only in the Fallout: New Vegas add-on, Dead Money.