Important Border Boundary Lines(Radcliffe Line, Durand Line, Macmahon Line, Parallel, etc.):

17th Parallel : between North Vietnam and South Vietnam

24th Parallel : between Pakistan and India (not recognized by India)

26th Parallel south : between Africa, Australia and South America

30th Parallel north : between the equator and the North Pole

33rd Parallel north : between United States, parts of North Africa, parts of the Middle East, and China

35th Parallel north : between Africa, the Mediterranean Sea, Asia, the Pacific Ocean, North America and the Atlantic Ocean.

36th Parallel : between Missouri and the State of Arkansas

37th Parallel : between southern boundary of the historic and extralegal Territory of Jefferson

38th Parallel : between North Korea and South Korea

39th Parallel north : between Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.

40th Parallel north : original northern boundary of the British Colony of Maryland.

41st Parallel north : between the State of Colorado with Nebraska and Wyoming and the southern boundary of the State of Wyoming with Colorado and Utah.

42nd Parallel north : between New York – Pennsylvania

43rd Parallel north : between the State of Nebraska and the State of South Dakota and also formed the northern border of the historic and extralegal Territory of Jefferson.

45th Parallel north : between the Equator and the North Pole

49th Parallel : between USA and Canada

Durand Line : between Pakistan and Afghanistan

Hindenburg Line : between Germany and Poland

Macmahon Line : between India and China

Marginal Line : between Russia-Finland

Mason-Dixon Line : between four states in the United State

Medicine Line : between Canada and the United States

Order-Neisse Line : between Poland and Germany

Radcliffe Line : between India and Pakistan
Siegfried Line : between Germany and France