Voices in the Tunnels (Formerly titled "In Search of the Mole People") is a 2008 documentary directed by Vic David, a New York City filmmaker and a graduate from New York University. It explores the lives of people who lived in the New York City Subway tunnels.
See also
Dark Days (film), a 2000 documentary on New York City tunnel inhabitants by filmmaker Marc Singer
Freedom Tunnel, a railroad tunnel in New York City frequently inhabited by homeless people
Mole people, homeless people living under large cities in abandoned subway, railroad, flood, and sewage tunnels
Tunnel People, a 2010 book on New York City tunnel inhabitants by anthropologist and journalist Teun Voeten
Urban exploration, the exploration of man-made structures including tunnels as a hobby