Another interesting example is the "green band", the former East-German border. One long stretch of land where for decades humans where mostly kept away, the land kept intentionally as short, easy to surveil vegetation to control the border, creating a habitat and travel route for various species as a side-effect. And now target of nature conservation efforts to keep it maintained as such a habitat.
These corridors have interested me since I first noticed on Google Earth how massive they are. Straight shots that go for miles and miles