There is something intensely grounding about mountain walks. The textures of the terrain you are passing over; worn paths, springy bog, hard slippery rock. The weather changing from cold and wet to sunny and warm. Views that disappear in shades of gray as far as the eye can see. The burning sensation in your muscles as they wake from their usual sedentary slumber. Even a little buttock clenching tension as you skitter down smooth rock having strayed from the path.
It's all very real and very different from our day to day concrete covered, air conditioned, electronically mediated lives.
It makes you realise how unreal much of our modern existence is. It makes you realise how many people never experience this feeling of groundedness. It makes you realise how many of the people running our world have lost any connection with it.
It makes you worry.