While simply an imaginary line decided upon in recent history, the border between Egypt [left] and Israel [right] is clearly seen even from space. The above photo was taken by U.S. Astronaut Commander Chris Hadfield aboard the International Space Station. It’s incredible to think how much a line can mean for geographical development and land usage.
9. Nepal and China
Mount Everest sits right on the border of Nepal and China making it one of the highest international borders that exists. It is heavily debated which country the summit of the world’s tallest mountain lies in, although Google Earth describes the summit as being located in China. You may just have to climb the mountain yourself to find out.