Answer:
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
Cloud is my mother, wind is my father. What am I?
The higher I climb, the hotter I engage. I cannot escape my crystal cage. What am I?
I don't live within a house nor do I live without. Most will use me when they come in and again when they go out.
I come with a train and go with a train and the train doesn't need me but can't go without me.
A word of five letters, Upside down is the same, A shark does this, But itβs not to blame. What is the word?