Because humans have almost never gone there for 60 years, the Korean DMZ has become a refuge for several endangered species such as Siberian tigers and red crowned cranes.
@Radu You say that like I have time. Which I do, but it's not a whole lot of time. In my free time I check up on SATW, check up on my RTS's, and then watch youtube for the rest of it until I get back to work.