If you’re interested in Ohio’s many long-lost small towns and villages, this is a great link. You can search through information for every county, read town histories, view photos and more. There are also links to old maps and indexes, as well as historic research resources. Take a look!
Ohio Ghost Town Exploration Co.
Similar to the Before and After posts of how Columbus has been changing, the link below from the site Urb-I, has hundreds of before and after photos of streetscape change in a host of world cities. Columbus itself is not included, but perhaps that can be changed as the site allows anyone to submit images.