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. The process uses gravity to propel the user. You can be stopped by dragging your feet or by water. Often a pulley is used suspended on a 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. 