I am a train geek. Waiting for the kid to become a teenager and start ignoring his father so I can be a volunteer at ABPF (Brazilian Railroad Preservation Society). Meanwhile, I go to places where there used to be railways or stations, take photos, write about these things and the history. Since it's been a long-neglected subject, people crave for any bits of information.
This work is even more crucial now that the Brazilian road system is collapsing. I can totally see investment being poured into railways again. Reminding people of how effective that system was can help speeding development!