Travel vlogger Johnny Harris gives viewers a history lesson about what he thinks are the three strangest borders on Earth.

The three borders Harris talks about are the sand wall built by Morocco to separate itself from Western Sahara, a border of Turkey inside Syria that changes constantly, and the oceanic border of the South China Sea which has been contentious.

Take a look at the video above to learn about these fascinating borders. And follow Johnny Harris on YouTube to watch more of his interesting videos.