Before NYC became concrete and asphalt, the island was covered by rivers, streams and marshes. Greenwich Village's Minetta Brook is one such watercourse and still makes its presence known in the basements of the structures built on top of it; some are still visible if you know where to look.

Join urban explorer Steve Duncan of Undercity.org as he shows us the Minetta's 1.5 mile buried path and explains the waterway functioning both today and in the past!