I am not going for post nuke here, I am just going with the city has been abandoned and then taken over by raiders later. Because New Vegas is just like fallout with some of the monuments of Vegas, And just a lot of garbage and brown.
Oh... $2 dollar tacos sounds good about now. I love fallout and new vegas, but the assets in the game could be done better. Look into urban exploring... there is plenty of websites out there with uber amounts of pictures. The post nuke/abandoned look is my favorite and looking forward to seeing more.