Tennessee le 19 juillet 2012: un "sinkhole" de 50 pieds de profondeur apparaît dans la cour arrière de citoyens et il cache des passages souterrains

Brison observed the sink hole was approximately 50 feet deep with underground cave-like rooms and what appeared to be a tunnel.

http://www.tennessean.com/viewart/20120731/WILLIAMSON09/307310046/Sinkhole-shocks-Cumberland-Dr-