You should know about areas in the mountains.
In the mountains the environment 1,000 feet to 12,000 feet in the air. The mountains very craggy mountain ranges
An oases has water and shade to live under and wood to make a shelter. The water is good for drinking
The desert is hot in the day and cool at night. It is good to travel in a caravan. So it isn't as easy to get goods stolen.
A coastal plain is an area of flat, low-lying land adjacent to a seacoast.