Which country would you find the world's longest fence?

I found this and the article is great !

1. Australia

2. This is the world's longest fence - and it's there just to keep dingoes out of south-east Australia. The Dingo Fence is almost 3,500 miles long and separates dingoes from the fertile land in the south-east, where sheep and cattle graze.Dec 18, 2013

3. The longest fence in the world: Boundary that stretches for ...

   www.dailymail.co.uk/.../The-longest-fence-world-Boundary-stret...