This is my third story on this site. I have experienced this kind of strange phenomenon long back in 2004 when I was out for morning walk with my maternal grandpa at around 4:00am-4:30am.
I would firstly like to tell about the area where my grandpa resided. The area was actually industrial and very spooky and lonely, especially at nights. There were all the huge chemical plants and chambers. In 2004 the area was not much of a residential type and so not much people were seen.
Coming back to my story, I had my summer vacations and so went to his house to spend some time with him. We, as usual, went for our morning walk at around 4:00am. It was pitch dark and the area was like a huge sandy ground with no buildings and there was only a structure like that of a light house (I am sorry it's kind of a faded memory in my mind now but still 95% it was a lighthouse). So we were passing by that spot and it was pin-drop silence in there.
Suddenly, as we headed ahead I heard some kind of strange and spooky chanting of women from that lighthouse. I was surprised as so I waited there for sometime so that I could hear that once again to get confirmed that I was not hallucinating and kept looking at it. But again there was silence. My grandpa said that he didn't hear any sounds of women and insisted me to keep on walking and I did so. Again the chanting started and this time a chill went down my spine and I stood still there, looking at that huge structure but then again there was silence. This happened for about 2-3 times, whenever I started to walk ahead and stopped the moment I looked at it.
I really don't know what it was and my grandpa said that he never heard any such sound there as it was his daily route for morning walk. But whatever it was, it was very spooky and strange and then I never went at that place again.
Now that area is quite developed but still at night we get to experience spooky atmosphere. Thank you for reading my story; I would be highly obliged if I receive comments on this. I would also like to know what was it.
People can only take wild guesses (not even educated guesses) ... Try to gather some folklore surrounding the light house. Anything.