Hauntings - Is It Real? - National Geographic Channel

Hauntings are often attributed to paranormal activity, ranging from bothersome poltergeists to possessive demons. How much of this activity is truly supernatural and how much exists only in our minds? An examination of the infamous Amityville, New York case shows that, outside of the horrific murders, the rest was clearly a fabrication. The eerie stories from Bobby Mackie's bar in Kentucky and the Luncaster Castle in England may have more natural causes. High carbon monoxide levels cause people to feel queasy and uneasy while strong magnetic fields which are known to cause hallucinations.