A "free running" workout with focus on hopping over obstacles in a physically graceful way, Le Parkour originated from France several years ago as a way to get from point A to point B in fast and in style. The workouts are best performed in an Urban environment, but can happen just about anywhere.
Some "traceurs," aka runners, can bust out some crazy maneuvers. Back flips off buildings, balancing on narrow walls on highway overpasses, handstands, jumping over cars, etc. A beginner should start with basic running and jumping, preferably not on top of a high building. You should be in decent shape before attempting a Parkour workout, as it's very demanding but one that's sure to improve cardiovascular endurance and overall strength and power.