What is an area of low land between two mountains or hills called?

Vally (Vallies). They are swoops or spaces in between the mountions + ranges.

Want to make one or you have 2 for a project follow these simple steps!

1. Get a Flat piece of paper (4-6)
2. Get an unsharpened pencil/non- popped pen
3. Colors (your option)
4. Lay the paper down on a surface.
5. Turn the side where u wanna put the mountions/vallies
6. get a friend to hold up the paper while you gently pop the paper carful not to poke a hole
7. place the paper down
8. if you need to do more redo number 6. until you get your desire number of mountions and vallies
9. DO NOT squish your paper or push it down. this will ruin it,
10. (color optioninal) turn in the sheet(s) sayinmg you ahd no help

*its not lying cause it just aint!!*