A zipline is an aerial ride system where a rider travels along a tensioned cable from a higher point to a lower point using a trolley, harness, and controlled braking system that is designed for fun, adventure, and safe repeat use. It can be installed for private homes, resorts, and public parks, with the ride length and speed tailored to the site layout and desired experience. For safety and reliability, the system requires proper engineering, certified equipment, and routine inspections as part of ongoing operation.