Hey Fishlips,
You may try looking for any kind of plants that appear out of the ordinary. Usually flowers and the like will re-propegate where they were originally planted unless the whole area has been plowed, then good luck!! I have come across old house sites by rows of rocks, berry plants, a couple old trees spaced just so, etc. In certain instances you can check old aerial photos of the area sometimes available at the library. Even newer photos will at times show features not seen at ground level.
P.S. Be careful around old wells.
HH
BC