Not just abandoned, this group is for things that seem to simply have been forgotten: old cemeteries, rusty cars, swingsets. Non-living things only. These are the things you know will still be there, unattended, if you drive by 10 years from now.
Snap a picture of an old building, house, farm or other structure, tag it with the location, and post it to this group. We may not be able to rebuild them, but we can remember them.