I thought I might share a bit about my spirituality.
I mostly think of religions and spiritualities as stories that give life meaning that come about as an emergent property from the interactions between generations of people and the land they live on.
Although I do not have strong faith in any particular ideology(ies), and more of just pick and choose stuff I think is cool, I think there is a lot out there that I do not know and may never know.
For me, a lot of it comes down to a mysticism of sorts that arises from my innate instincts.
In both human buildings and in the outdoors, I usually have some sort of feeling that something(s) or someone(s) is always there. And with that feeling, even outdoors, I usually feel like I am a guest or visitor no matter where I am. That my existence and life is a gift of sorts.
I don't necessarily ascribe it to anyone or anything in particular. I might call it Nature or The Powers that Be or God or The Creators, depending on whom I am talking with, as this is not something I am terribly passionate about, and I am willing to use whatever terms people prefer to use.
I think the world is a product of Nature/Powers-That_Be/Creator(s)/God, and I think was also made by them. So, I think it is honorable and an act of the highest spirituality to enjoy the outdoors as much as I can. I think being outside and enjoying their work brings me honor and brings them honor. And as part of their creation, I think it is also my duty to take care of the rest of creation and be a good steward. I think that brings honor and respect, too.
And that's mostly it for my spirituality of sorts.
How does nature and the outdoors play into your spirituality?
I think I feel similarly to you, though I may have a slightly stronger attachment to unseen (supernatural) beings than you do. I say "attachment" because I'm not convinced that I believe in them, just that I feel strongly about some unseen (possibly imaginary) beings that don't seem to reside in the natural world. I feel strongly about the living world and feel my best when I am out in it as much as possible.