Zip line
Typically a zip-line consists of a pulley that rides a cable down an incline. Most often these contraptions are used as a means of entertainment.
Zip-lines come in all forms and shapes. Sometimes they are short and low, intended for childs play. This kind is sometimes found on playgrounds. Longer and higher rides are often found at outdoor adventure camps where they are usually one element on a larger challenge course, or ropes course.
Small zip-lines can be ridden with a hand car that is held on to and the person hangs underneath. Larger rides nesesitate that the rider wear a safety harness. These rides can be very high, starting at a height of over thirty feet, and travelling well over two hundred feet.
Warning:
A large zip-line must have some stopping mechanism. Sometimes a bungee cord is used, sometimes the end simply is placed as high as the beginning, which stops the rider as well.
Zip lines are not for everybody, and be sure not to ride one shortly after eating.