In ancient times, the search for water for digging the well was carried out by special shamers who are people who, using a vine, determine the places of passage of the underground river. Such craftsmen are now in small villages. Of course, one can trust them, since these are professionals who have been working in this area of activity for many centuries. But still, technologies are constantly improved and updated, so in many ways the best option would be to use specialized hydrogeological companies, which know how to determine the places of focusing groundwater.