Worlds Largest Underground City

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=qnL63lEceDE

World's Largest Underground City • An underground city is a series of linked subterranean spaces that may provide a defensive refuge; a place for living, working or shopping; a transit system; mausolea; wine or storage cellars; cisterns or drainage channels; or several of these. The term may also refer to a network of tunnels that connects buildings beneath street level.[citation needed], which may house office blocks, shopping malls, metro stations, theatres, and other attractions. These passages can usually be accessed through the public space of any of the buildings connecting to them, and sometimes have separate entries as well. This latter definition encompasses many modern structures, whereas the former more generally covers tunnel systems from ancient times to the present day. • Read more : https://en.wikipedia.org/wiki/Undergr... • • May you find this video informative and be thrilled to subscribe for more. Thanks for watching!

#############################

New on site