To find a ley, you will need a device to find it.
And in a Websters dictionary that I own(never used it much) are the following.
Diving rod, a rod commonly of hazel, with forked branches, used by those who pretend to discover water or metals underground.
Diviner, one who professes divination, one who pretends to predict events, or to reveal occult things, by the aid of superior beings, or of supernatural means.

Kevin, the great pretender.