What is Zip line?
[[File:Zip line.jpg|thumb|300px|{{Center|Zip line crossing of the Giri river, [[Himachal Pradesh]], [[India]]}}]] A '''zip-line''' (also called a '''zip line''', '''zip wire''', '''aerial runway''', '''aerial ropeslide''', '''death slide''' or '''Tyrolean crossing''') is a device that allows a person to slide down an inclined [[wire]] or [[rope]].<ref>''Who Really Benefits From Tourism?'' (Equations, 2009-2010), pp. 37–38</ref> The process uses [[gravity]] to propel the user. You can be stopped by dragging your feet or by water.<ref>Jacques Marais; Lisa De Speville, ''Adventure Racing'', (Champaign, IL: Human Kinetics, 2004), p. 66 {{ISBN|0736059113}}</ref> Often a [[pulley]] is used suspended on a [[Wire rope|cable]], usually made of [[stainless steel]]. Zip-lines are often used for [[entertainment]]. Some are short and low designed for children on a [[playground]]. Zip-lines are often used as a means of getting to remote areas, such as a [[rainforest]] canopy or crossing a [[river]]. == History == The zip-wire has been used as a way to get around in some [[mountain]]ous [[countries]] for over 2,000 years.<ref>{{cite web|author=Kris De Decker|title=Aerial ropeways: automatic cargo transport for a bargain|url=http://www.lowtechmagazine.com/2011/01/aerial-ropeways-automatic-cargo-transport.html|access-date=10 July 2015|publisher=Low-tech Magazine}}</ref> Since the 1700s they have been used in places like Europe, China and the Himalayas.<ref name=CT>{{cite web |url=http://www.canopytours-vallarta.com/en/blog/2012/06/the-history-of-the-zip-line/ |title=THE HISTORY OF THE ZIP LINE |publisher=canopytours-vallarta.com |access-date=10 July 2015 |archive-date=5 March 2016 |archive-url=https://web.archive.org/web/20160305160744/http://www.canopytours-vallarta.com/en/blog/2012/06/the-history-of-the-zip-line/ |url-status=dead }}</ref> In the [[Australia]]n [[outback]], zip-lines were occasionally used for delivering food, cigarettes or tools.<ref name=CT/> They were useful for people working on the other side of an obsta