Pass
Lewis and Clark faced the Rocky Mountains during their exploration of Oregon and Washington. This mountain range presented a significant obstacle to their journey as they crossed over rugged terrain and navigated through mountain passes.
Mountain passes gave traveling settlers a way to travel through the mountains. Without the passes, the settlers would have to travel to higher and more dangerous altitudes.
The Rocky Mountains.
The Rocky Mountains
they allow us to pass through another country
No, they crossed through mountain valleys and passes.
The Alps
Those breaks are called mountain passes. They are natural routes that provide access for trade and military movement through mountain ranges.
If an airplane passes through a mountain it will be tunnelling underground, probably as a result of having crashed. Anything passing through solid rock is going to be subject to an element of turbulence.
Daniel Boone was the frontiersman who crossed the mountain that passes to Kentucky and Tennessee. He carved the trail for the Transylvania Company from Long Island in Kingsport, Tennessee through the mountains and forests to Kentucky.
The Andes Mountains is the answer to study island. I hope that helps.