A mountainous desert landscape is much different than what we can usually observe from the other landscapes.
The landscape will be dominated by grayish, yellowish, and reddish colors. It will be very dry and the vegetation will be very scarce. Most of the landscape will be dominated by pieces of rocks from all sizes and shapes. The high level of erosion will be easy to notice as there will be land features formed because of the erosion on every corner. Dried out river beds are also a common feature.
