Mountains catch light and shadow so subtly and differently from moment to moment, their beauty brings enough surprise to feel transportive. There is a sense of renewal given by myriad conditions.
It is the same way when you hit the road for a walk, run, or cycling. Part of the reason for hitting the road is to put variety in your life. There are so many roads, routes, directions, and orders of taking them that hitting the road will often have reset value for you.