In America, between the states, and in the same European Union between countries, boundary is indicative and not always visible. There is, perhaps, the inscription on the greeting in a particular place. However, in the world, there are unusual and remarkable border which will be discussed today.

The border Spain to Morocco

The border between Belgium and the Netherlands among the tables in the cafe

Bir Tawil

Mount Everest

District of Columbia

Derby Line, Vermont

District Cooch-Behar

Korean demilitarized zone

Tumen River

Diomede Islands