For all the times we been to Vegas, we didn’t even know tunnels existed there. Here’s Lisa Ling’s report for Nightline about “tunnel people” in Vegas. Apparently, hundreds of homeless people live under the neon lights of Vegas.

Also check out the latest special reports by Lisa Ling for Nightline including marijuana in California, Los Angeles water cops, and Locke High School.

Tunnel People in Vegas by Lisa Ling