Borders marked by massive objects, such as a wall or a fence, often keep people from living near them. Thus, in many cases border areas become a no-man's land that allows other animals to live more freely on it. 

The lack of human settlement in the Chernobyl region in Ukraine created a protected environment where other types of life thrive. The abandoned area where human life is banned for the next 24,000 years will allow life to develop without human interruption for thousands of years.