For those who have caught a glimpse of the ghostly light, it is as baffling as it is dazzling.
Deep in the backwoods of America's Ozark hills in Missouri, locals have been bewitched by the mysterious 'Spook Light' for more than a century.
It can only be seen on chance evenings as a floating orb, hovering on a remote country road in an area known as the Devil's Promenade.
Some witnesses say it's a brilliant blue, others insist it is red. Guesses about its origins range from everyday expulsions of natural gas to UFOs or the haunting spectre of a headless indigenous inhabitant of the area.
Nothing is known for sure about the Spook Light. Not even a 1950s investigation by the United States Army Corps of Engineers could figure out the cause of the chilling apparition.
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