Dowsing, Divining water, metals & other things Options

I am naive in this field but I have seen some diviners dowsing to a breath-taking accuracy. For example, there are persons who would dowse on a map with a pendulum and the pendulum would vibrate at the exact spot-point below which water or the treasure is there and they will tell at what exact depth the desired thing can be found.

You are safe as far as spellbegging in my opinion.

You are just encouraging discussion on a previous topic. Although at this point the thread might be too old to ressurect. Spell begging is usually totally obvious and along the lines of "I want to make this person fall in love with me, tell me what to do."

I would also like to see the idea of dowsing discussed. What to others think of it. Is it an unexplained science? More mystical in nature?

In some areas where water is difficult to be found even large-scale hydology companies will sometimes bring in a dowser. And at times they can be startingly effective. Any thoughts on how it is done?