Up until a year ago I worked on a personal project that involved putting online photos of old cars from my country as found on GoogleStreetView + some photos of the same old cars personally taken by me [1], the reason being that most of those cars will be totally gone in the next 10 to 15 years (many of them are already gone since Google took most of the photos back in 2012 and 2014) and so I wanted to sort of preserve and make these images easily searchable/browsable for existing and future car nerds.
I've also started a small project [2] where I'm posting photos of local flour mills built before WW2. I find them very interesting from an industrial-architectural point of view and by image-documenting as many of them as I can I hope that somehow these buildings will stir the interest of people with some more influence than me when it comes to architectural preservation so that maybe not that many of them will be teared down. I suspect this will be an "on-going project" for quite some time, as until now I've only taken photos of about 30 of these mills, while I counted 500+ still existing in the whole country (mostly using Google Maps/StreetView + Google Image searches + some old topographic maps).