Story --Click here to view--
A few images to go along --Click here to view--
You can read the rest here: Sin City underground tunnels
I have to say that the situation is rather fascinating and ironic and polar opposites of what happens top and bottom of such a lavish city. I've heard of homeless people sleeping on park benches or beneath sewer drains, but to build an entire miniature civilization?? That's pretty damn crazy. I figure that since this story has broken out, Las Vegas would clear these people out due to the major health hazard it provides.