The Iron Curtain was an 8,000-mile border separating East from West during the Cold War. Something unexpected evolved in the “no man’s land” that the massive border created. In the absence of human intervention and disruption, an accidental wildlife refuge formed.
After the fall of the Berlin Wall, conservationists from both sides of the divide realized this long-unused space could become the core path of a “European Greenbelt” connecting habitats across countries, including national parks and nature preserves.
Such wildlife corridors can be found around the world at a range of scales, from mountain lion freeway overpasses and crab bridges to squirrel wires and fish ladders.
Then, of course, there’s the fish cannon.