Cave exploring (also known as caving or spelunking) is the art of safely moving through a natural cave to a destination and returning to the surface without hurting yourself or the cave.
A zip-line consists of a pulley suspended on a cable, usually made of stainless steel, mounted on a slope. It is designed to enable a user propelled by gravity to travel from the top to the bottom of the inclined cable by holding on to, or attaching to, the freely moving pulley.
A sport of climbing natural rock formations or artificial rock walls with or without rope. At its most basic, rock climbing involves climbing a route with one's own hands and feet and little more than a cushioned bouldering pad in the way of protection. This style of climbing is called bouldering, since the relevant routes are usually found on boulders no more than 10 to 15 feet tall. In top-roping, an anchor is set up at the summit of a route prior to the start of a climb. Rope is run through the anchor; one end attaches to the climber and the other to the belayer, who keeps the rope taut during the climb and prevents long falls. (This is the safest form of climbing and used by most beginners. In lead climbing, one person, called the "leader", will climb from the ground up with rope directly attached (and not through a top anchor) while the other, called the "second", belays the leader. As they progress, the leader clips the rope through intermediate points of protection that limit the length of a potential fall.) Rappelling techniques are used to descend.