An anomalous form that can appear on photographs taken during paranormal investigations that some believe to be a gateway or door to the spirit world and the center of an associated paranormal disturbance. Vortices usually appear as a long whirlwind or column of light in a photograph. Some investigators and mediums believe the vortex can be used as a way for spirits to travel to and from the spirit world to our own world.
Skeptics argue that photographic anomalies such as this can be caused by conventional means such as an object close to the camera ( a camera strap for example ). There is currently no conclusive evidence that this particular type of anomaly is paranormal in nature.