Visited an old farmhouse that later on I found out my great-aunt rented in the 60s.
Visited a TB Sanitorium that my aunts mother stayed at for a few years.
Visited the hospital all my step-grandfathers kids were born at (It wasn't "abandoned" per say but empty, and was demolished a few months later).
It's always cool when you find stuff like that. Although sad. It's cool to catch the memories of the place while you can, and I've found that sometimes the family is interested in seeing the photos, as theyd never go themselves.