Amazing Underground SecretsDVD - 2012
Beneath our feet there's a whole other world. This series goes deep underground, in search of the hidden side of our history. In three programs we'll go across the globe to uncover everything from smugglers' tunnels to underground towns complete with transport systems and factories; from ancient caves and catacombs to the most modern technological marvels. Includes: State Secrets, Underworld Mysteries, and Underground Engineers.
Publisher: Chicago : Questar, c2012
Characteristics: 3 videodiscs (3 hrs.) : sd., col. ; 4 3/4 in