A valley or crater
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If the mountains are close together, close enough to blend into each other, the space between them is called a saddle.
....or maybe you're looking for the word "cleavage"
if it is a small distance between both mountains it is a valley . if it is a great distance between the mountains it is called a plain---------------- the space that lies along a line between the peak of two mountains that are very close to each other is called a saddle.
a valley
Pass
Grampian Mountains and Cairngorm Mountains.
Mountain pass
if it is a small distance between both mountains it is a valley . if it is a great distance between the mountains it is called a plain---------------- the space that lies along a line between the peak of two mountains that are very close to each other is called a saddle.
The space is called a vally-------------------------------------------------------------------------------------------Actually it depends on what you mean by "between" . the actually space that lies between two mountain tops is called a saddle. Thinking of a valley as the intersection where the two sides of two mountains merge is a bit of stretch but could be true. In that case, the valley originates at the saddle which often forms a valley on opposite sides.
a valley
No Man's Land is the name of the space between the two sides front lines.
No Man's Land is the name of the space between the two sides front lines.
No Man's Land is the name of the space between the two sides front lines.
Pass
The synapse is the name of the space between two nerves.
coelom
parallel
Astragals
straight line.