Zip-lining is an outdoor activity that involves gliding along a suspended cable, usually strung between two points at different heights. Participants wear a harness attached to a pulley, allowing them to slide down the cable while enjoying scenic views. This adventure sport is often found in forests, mountains, or adventure parks. Safety is a key aspect of zip-lining, with operators ensuring that equipment is well-maintained and that participants receive proper instructions. Many zip-line courses also include safety gear, such as helmets and gloves, to protect riders during their experience. Popular destinations for zip-lining include Costa Rica, Hawaii, and the Appalachian Mountains.