The heavily armed DMZ separating North and South Korea has become a wildlife haven

Between North and South Korea lies the demilitarized zone (DMZ), one of the world's most heavily armed borders. The 160-mile stretch is barred with fences and landmines and is largely empty of human activity.

source https://www.cnn.com/travel/article/korea-dmz-google-view-wildlife-intl-hnk/index.html