This video of a strange sound has been recordered in the morning, April 6, 2012, in Athens, Greece.
The author’s comments:
I heard these sounds at April 6, 2012 in the morning, in Athens, Greece where I live, for about ten minutes and they really gave me the creeps!! What do you thing?? What is really happening all over the world with these sounds?? (I took the video with my mobile phone so the picture is not very clear but you can see Acropolis in the background, however the sounds can be heard very clear!!)