The irony is hard to overlook. There are few, if any, cities on earth where the show of wealth and consumption is so shamelessly on display, and yet hidden beneath the surface of Las Vegas, another world exists.

In sobering contrast with the bright lights and bustle of the famous strip up above, dispossessed people inhabit the storm drains that run below, venturing up into the casinos to make ends meet scouring the slot machines for coins or credits left by drunken gamblers.

Read more at Environmental Graffiti. Photo by Austin Hargrave.