The Taos Hum 

Taos hum in mexico is said to be ha haunted place. One can hear a diesel engine sound in this place. Strangely it could be heard only by naked ear. The microphones and sound recorders are unable to recognize this sound. Scientists have failed a lot, they haven't found the reasons for the sound. Many people have left this place believing that this place is haunted. 8) Aluminium wedge of Aiud    The aluminum wedge is found in 1917 and the scientists confirmed that this is made atleast 400 years back. But the strangest thing is aluminium is found in 1800's and it has started to bulk produce in 1900's. Technically there are no such apparatus available in those years to produce the aluminium. 7) The Overtoun bridge  This bridge has been the most mysterious place. Dog's come here and attempts a suicide. Reports suggest that at least 60 dogs in an year would attempt a suicide from this bridge. The most mysterious thing is why the same place and why this same bridge. Strange.