The following are computer generated images of bondage and torture devices. (contains explicit images of naked, bound, human animal.)
The following are some photos of Cage (BDSM). Note that cages are not just for modern BDSM play, they were ancient devices. When a person is constrained in a small cage that defines the posture, extreme pain will result in prolonged confinement. (think of back pain when sitting in prolonged slouch) As a execution device, sometimes the condemned is to be placed in a cage and hung in front of a church till death.
Cage as a exciting sight, is often employed in dance clubs, where a girl dancer (or guy) dances inside it.