My ex and I used to love going through cemetaries, provided they were not marked "No Trespassing." Most cemetaries close at dusk. It is amazing the amount of history you can find on a region just by paying attention to the dates and names. It becomes obvious when times were good and bad. It is also interesting to note details of the area (street names, business names , historical markers) as these can be clues to prominant families or at least names of regional value. If you would like further ideas, let me know.