USA, Michigan, Menominee county. A 200 meters /650 foot long, 1.5m/5 foot deep crack in the ground. No earthquake detected. _http://video.godlikeproductions.com/video/Unexplained_crack_in_the_ground
An underground river ?
Mod's note: Edited to deactivate the link
An underground river ?
Mod's note: Edited to deactivate the link
